# NATS Stage 3 Assessment Centre Guide

> Understand NATS Stage 3: interview, ATC knowledge test, observed retesting and virtual assessment centre tips.

Canonical: https://www.atcpracticetest.com/nats/nats-stage-3-assessment-centre/

Site guide: https://www.atcpracticetest.com/llms.txt

## What happens at the NATS Stage 3 assessment centre?

Stage 3 is where the NATS process stops feeling like a set of remote aptitude tests and starts feeling like a selection event.

NATS currently runs Stage 3 virtually through Microsoft Teams. The published format has three parts: **an interview, an Air Traffic Control knowledge test, and observed retesting of earlier assessments**.

Those three parts need different preparation. For the interview, you need real examples from your own experience. For the knowledge test, you need a current understanding of NATS and the controller role. For retesting, you need to reproduce your own earlier performance while being observed.

The invitation controls the practical details—timing, identification, Microsoft Teams setup and which retests are used—so read it before building your final preparation plan.

## Where Stage 3 fits in the recruitment process

Stage 3 follows the [NATS Stage 2 tests](/nats/nats-stage-2-tests/).

The current recruitment structure is:

Stage

Current published description

Stage 1

Eleven online ability tests

Stage 2

Online Situational Judgement Test and Listening Comprehension test

Stage 3

Virtual assessment centre with an interview, ATC knowledge test and observed retesting

Stage 4

Practical exercise delivered virtually or face to face

After the assessments

Conditional offer subject to medical, security and other employment requirements

Candidates who pass Stage 3 may be invited to complete the [NATS Stage 4 practical exercise](/nats/nats-stage-4-practical-exercise/).

Passing Stage 3 does not guarantee:

-   success at Stage 4;
-   a conditional employment offer;
-   Class 3 medical certification;
-   SC security clearance;
-   a particular training date;
-   a particular training location;
-   a preferred operational posting;
-   successful completion of controller training.

Stage 3 is an important selection point, but it remains one part of a longer recruitment and training process.

## NATS Stage 3 at a glance

Component

Current official description

Main preparation focus

Delivery

Virtual assessment centre through Microsoft Teams

Technical readiness, professional environment and careful reading of instructions

Interview

Interview with NATS assessors

Motivation, role understanding and genuine competency evidence

Knowledge test

Air Traffic Control knowledge test

Current public information about NATS, controller roles, recruitment and training

Retesting

Previous assessments repeated while observed

Stable performance, integrity, concentration and compliance with instructions

Next step

Stage 4 practical exercise if successful

Practical learning, situational awareness and response to feedback

This table summarises the published structure. It is not an official scoring matrix.

## Why Stage 3 is different from the online tests

Stages 1 and 2 are completed as online assessments.

Stage 3 introduces direct interaction with assessors.

This means candidates may need to demonstrate more than the ability to select correct answers.

The assessment centre may also provide evidence of how you:

-   explain your motivation;
-   describe your own behaviour;
-   communicate under pressure;
-   respond to follow-up questions;
-   understand the realities of the career;
-   apply knowledge rather than recite isolated facts;
-   perform while being observed;
-   follow instructions;
-   handle technical or unexpected difficulties professionally.

A highly rehearsed answer may be less useful when an assessor asks:

-   why you made a particular decision;
-   what you personally contributed;
-   what you learnt;
-   what you would change;
-   how the experience relates to air traffic controller training.

Preparation should therefore develop understanding and evidence rather than memorised scripts.

## Set up the virtual session properly

Treat the Microsoft Teams session like an in-person assessment centre that happens to be on a screen. Test the computer, camera, microphone and connection before the day, and use a quiet room with reliable power and minimal interruptions.

Have the identification and any permitted materials ready before the call starts. Do not assume a phone or tablet is acceptable simply because Teams can run on one; use the device requirements in your invitation.

The point of the setup is to make the technology boring. You want your attention on the interview and assessments, not on audio settings.

## The NATS Stage 3 interview

The interview allows NATS to assess whether your motivation, behaviour and understanding are consistent with the demands of trainee air traffic controller selection and training.

NATS does not publish a complete list of current interview questions on its main recruitment page.

Candidate reports on Glassdoor, Quora, forums and social media may describe individual experiences, but they should not be treated as an exact or permanent question bank.

Interview content can change between campaigns, and assessors may adapt follow-up questions according to your answers.

Preparation should therefore focus on:

-   understanding the role;
-   researching NATS;
-   analysing the training commitment;
-   preparing genuine examples;
-   explaining your decisions;
-   responding naturally to follow-up questions.

## What the interview may explore

Potential themes include:

-   why you want to become an air traffic controller;
-   why you are interested in NATS;
-   what you understand about the controller role;
-   the distinction between aerodrome, approach and area control;
-   the demands of training;
-   shift work;
-   mobility and relocation;
-   teamwork;
-   communication;
-   accountability;
-   learning from mistakes;
-   resilience;
-   adaptability;
-   performance under pressure;
-   acceptance of feedback;
-   commitment to a safety-critical career.

These are broad preparation themes, not confirmed current questions.

## Understanding your motivation

A strong motivation answer should go beyond:

-   liking aircraft;
-   enjoying travel;
-   wanting a high salary;
-   wanting an exciting career;
-   playing aviation games;
-   being interested in airports.

These interests can form part of your motivation, but they do not demonstrate that you understand the occupation.

A stronger explanation may connect your interest with:

-   structured decision-making;
-   safety responsibility;
-   precise communication;
-   concentration;
-   teamwork;
-   continuous learning;
-   technically demanding work;
-   the realities of training and shift work.

Your answer should remain honest.

Do not claim that you have wanted the career since childhood when that is not true. A recent but well-researched career decision can be more credible than an invented lifelong ambition.

## Researching NATS for the interview

Candidates should understand at least the public fundamentals of the organisation.

Useful topics include:

-   what NATS does;
-   the types of air traffic services it provides;
-   the three broad controller specialisms;
-   the role of airport control units;
-   the role of Swanwick and Prestwick control centres;
-   the trainee training pathway;
-   the Student Air Traffic Control Licence;
-   operational unit training;
-   mobility requirements;
-   current recruitment stages;
-   the safety-critical nature of the work.

Do not attempt to impress assessors by memorising obscure statistics without understanding their relevance.

Current, accurate knowledge is more useful than a large collection of disconnected facts.

## Preparing competency examples

Prepare several genuine examples from:

-   employment;
-   education;
-   volunteering;
-   sport;
-   community activity;
-   family responsibilities;
-   personal projects;
-   military service;
-   other structured experiences.

The example does not need to come from aviation.

A suitable example should show what you personally did.

Useful themes include:

-   working with others;
-   managing competing priorities;
-   responding to pressure;
-   communicating difficult information;
-   taking responsibility for an error;
-   learning a complex task;
-   adapting after feedback;
-   maintaining accuracy;
-   resolving disagreement;
-   making a decision with limited time.

Avoid using the same example for every question unless it genuinely demonstrates several different competencies.

## Using the STAR structure

The STAR structure can help organise an interview response.

### Situation

Explain the context briefly.

Include only the information needed to understand the example.

### Task

Explain:

-   what needed to be achieved;
-   what your responsibility was;
-   why the situation mattered.

### Action

Describe what you personally did.

This should normally be the largest part of the answer.

Explain:

-   what you considered;
-   what decision you made;
-   how you communicated;
-   how you involved other people;
-   how you managed risk;
-   how you adjusted when circumstances changed.

### Result

Explain:

-   what happened;
-   whether the objective was achieved;
-   what you learnt;
-   what you would repeat;
-   what you would improve.

Do not force every answer into an artificial speech.

STAR should provide structure without making the response sound memorised.

## Original interview preparation questions

> The following questions are original preparation prompts. They are not official NATS interview questions and are not presented as predictions of the current assessment.

### Motivation

Why do you want to become an air traffic controller, and which aspects of the role have you researched carefully?

### Role understanding

How would you explain the difference between aerodrome, approach and area control to someone unfamiliar with air traffic management?

### Accountability

Describe a time when you made a mistake that could have affected another person’s work. What did you do?

### Pressure

Give an example of a situation in which you had several urgent demands. How did you decide what to address first?

### Teamwork

Describe a time when you disagreed with a colleague or team member. How did you manage the disagreement?

### Learning from feedback

Tell us about a time when feedback required you to change a method that you believed was working.

### Communication

Describe a situation in which you had to explain complex or important information clearly.

### Adaptability

Give an example of a plan that changed unexpectedly. How did you update your approach?

## How to prepare strong interview answers

For each example, ask:

-   Is the example genuine?
-   Is my own role clear?
-   Did I explain the decision rather than only the event?
-   Did I communicate with the appropriate people?
-   Did I take responsibility?
-   Did I identify any risk?
-   Did I learn something?
-   Can I answer a follow-up question?
-   Does the example demonstrate the intended competency?

Do not memorise every word.

Instead, remember:

-   the context;
-   your responsibility;
-   two or three key actions;
-   the outcome;
-   the lesson.

This supports a natural response while keeping the evidence organised.

The dedicated interview section below provides more detailed interview preparation.

## Common interview mistakes

### Giving a generic motivation answer

Saying that the career is “interesting” or “challenging” does not show that you understand it.

Connect your motivation to the actual responsibilities and working conditions.

### Reciting the NATS website

Research is important, but repeating text without interpretation can sound superficial.

Explain what the information means for you as a candidate.

### Describing what the team did

The assessor needs to understand your contribution.

Use “we” for the wider context and “I” for your actions.

### Providing no result

An answer without an outcome is incomplete.

Explain what happened and what you learnt.

### Claiming that nothing went wrong

Safety-critical training requires candidates who can recognise errors and learn.

An honest example of improvement can be stronger than a claim of flawless performance.

### Giving a rehearsed model answer

Generic answers may collapse under follow-up questions.

Prepare evidence rather than scripts.

### Ignoring mobility and shift work

Candidates should understand that air traffic controllers are a mobile grade and may be posted according to business needs.

Do not imply that you will accept only one location unless the recruitment process explicitly provides that option.

### Exaggerating aviation knowledge

You are applying for a trainee route.

Do not claim professional knowledge that you do not possess.

## The NATS Air Traffic Control knowledge test

The current Stage 3 assessment centre includes an Air Traffic Control knowledge test.

This is separate from the Stage 1 aptitude battery.

The distinction is important:

-   aptitude testing examines how you process information;
-   knowledge testing examines what you have researched or learnt;
-   professional training teaches the operational knowledge required to become a controller.

NATS does not publish a complete current knowledge-test syllabus on its main trainee recruitment page.

Unofficial flashcards on Quizlet, Brainscape or other platforms should not be treated as authoritative.

They may contain:

-   outdated information;
-   candidate-recalled content;
-   user errors;
-   questions from an older campaign;
-   information unrelated to the current assessment;
-   material copied without permission.

Prepare from current public sources rather than attempting to memorise an alleged official question bank.

## What should you study?

A sensible high-level study plan may include:

### NATS as an organisation

Understand:

-   the role of NATS in UK air traffic services;
-   its broad responsibilities;
-   the environments in which its controllers work;
-   its emphasis on safety and efficiency.

### Controller specialisms

Understand the broad distinction between:

-   Aerodrome controllers;
-   Approach controllers;
-   Area controllers.

You should be able to explain each role clearly without presenting yourself as a trained controller.

### The recruitment process

Review:

-   eligibility;
-   Stage 1;
-   Stage 2;
-   Stage 3;
-   Stage 4;
-   conditional offers;
-   medical clearance;
-   security clearance.

### The training pathway

Understand the broad progression from:

1.  initial training;
2.  Student Air Traffic Control Licence;
3.  operational unit training;
4.  validation;
5.  full controller licensing.

### Working locations

Understand that NATS controllers may work:

-   at airport units;
-   at Swanwick Control Centre;
-   at Prestwick Control Centre.

Candidates should also understand the mobility requirement.

### Safety-critical working

Understand why the role requires:

-   honesty;
-   accurate communication;
-   procedural compliance;
-   teamwork;
-   responsibility;
-   medical fitness;
-   security vetting;
-   drug and alcohol compliance.

## What not to study as professional instruction

Do not attempt to teach yourself operational control procedures as though you were already in training.

Candidates are not expected to arrive able to:

-   apply professional separation minima;
-   issue real control clearances;
-   operate NATS systems;
-   control live traffic;
-   use full operational phraseology;
-   interpret confidential procedures.

High-level public understanding is appropriate. Professional operational knowledge belongs within approved training.

## Original knowledge-check examples

> The following questions are original study examples based on public, high-level career information. They are not official NATS knowledge-test questions and are not intended to predict the current assessment.

### Example 1: controller specialisms

Which controller specialism is most closely associated with managing aircraft and authorised vehicles at an airport?

A. Area control  
B. Aerodrome control  
C. Network planning  
D. Engineering control

#### Answer

**B. Aerodrome control**

#### Explanation

Aerodrome controllers work in the airport environment and may manage aircraft and vehicle movements on or close to the aerodrome.

### Example 2: approach control

Which description best matches approach control?

A. Managing only aircraft parked at terminal stands  
B. Managing aircraft travelling across the North Atlantic exclusively  
C. Organising arriving and departing aircraft within the relevant area around an airport  
D. Maintaining airport buildings and navigation equipment

#### Answer

**C. Organising arriving and departing aircraft within the relevant area around an airport**

#### Explanation

Approach controllers manage traffic approaching or departing an airport and coordinate with other control units.

### Example 3: area control

Where are area controllers generally associated with working?

A. Only from airport fire stations  
B. From control centres managing larger airspace sectors  
C. Exclusively from aircraft flight decks  
D. From airline booking offices

#### Answer

**B. From control centres managing larger airspace sectors**

#### Explanation

Area controllers manage aircraft travelling through larger sectors of controlled airspace.

### Example 4: training progression

What normally happens after a trainee gains a Student Air Traffic Control Licence?

A. The trainee automatically becomes qualified at every NATS location.  
B. The trainee stops receiving assessment.  
C. The trainee continues supervised training at an operational unit.  
D. The trainee chooses any airport without further training.

#### Answer

**C. The trainee continues supervised training at an operational unit.**

#### Explanation

The student licence supports progression into operational unit training. The trainee must still complete local training and validation.

### Example 5: mobility

Which statement best reflects the current NATS mobility requirement?

A. Every trainee is guaranteed their nearest airport.  
B. Candidates can always choose between Swanwick and Prestwick.  
C. Posting may depend on training, skills and business needs.  
D. All trainees work remotely after initial training.

#### Answer

**C. Posting may depend on training, skills and business needs.**

#### Explanation

NATS describes air traffic controllers as a mobile grade. Candidates should be prepared for training or work at a location determined by organisational requirements.

### Example 6: safety-critical employment

Why are honesty and accurate disclosure important during NATS recruitment?

A. They replace the aptitude assessments.  
B. The role involves medical, security and professional safety requirements.  
C. They guarantee a preferred posting.  
D. They eliminate the need for training.

#### Answer

**B. The role involves medical, security and professional safety requirements.**

#### Explanation

Candidates may undergo qualification checks, medical assessment and security vetting. Complete and truthful information is essential.

## How to prepare for the knowledge test

### Use current official information

Begin with the current NATS trainee careers page.

Review:

-   controller roles;
-   recruitment;
-   training;
-   working locations;
-   mobility;
-   salary only where relevant to career understanding;
-   safety-critical expectations.

### Create your own notes

Write short explanations in your own words.

For example:

-   What does an aerodrome controller do?
-   How does approach control differ from area control?
-   What happens after initial training?
-   Why is mobility important?
-   What conditions remain after a conditional offer?

Writing your own explanations encourages understanding rather than recognition.

### Use retrieval practice

Close your notes and answer questions from memory.

Then compare your answer with the current official source.

Retrieval practice is more effective than repeatedly rereading the same page.

### Check for outdated information

Do not mix the current process with historical NATS recruitment systems.

Older material may refer to:

-   different stage numbers;
-   different assessment providers;
-   previous assessment-centre formats;
-   different training arrangements;
-   outdated working locations;
-   old salary rates.

The knowledge-test section below provides a more complete ethical study framework.

## Observed retesting of previous assessments

NATS currently states that Stage 3 includes retesting of previous tests while the candidate is observed.

The main recruitment page does not publicly specify:

-   which tests will be repeated;
-   how many tests will be repeated;
-   whether every candidate receives the same retests;
-   whether the format is identical;
-   the exact observation procedure;
-   how the retest is weighted;
-   how closely results must match.

Do not rely on another candidate’s account as a guarantee of your own retesting arrangement.

## Why observed retesting matters

Observed retesting may help NATS confirm that earlier results represent the candidate’s own ability.

It reinforces the importance of:

-   completing online assessments independently;
-   avoiding unauthorised assistance;
-   developing genuine skill;
-   practising varied formats;
-   maintaining stable performance;
-   following instructions under observation.

A candidate who relied on:

-   another person;
-   prohibited notes;
-   an unauthorised calculator;
-   external software;
-   remembered answer patterns;
-   an unrepresentative practice interface;

may find it difficult to reproduce the underlying performance under observation.

## How to prepare for observed retesting

### Revisit the underlying abilities

Review the skills assessed during earlier stages, including:

-   spatial awareness;
-   logical thinking;
-   numerical ability;
-   sense of direction;
-   reaction control;
-   situational judgement;
-   listening comprehension.

Do not attempt to memorise old test items.

### Use varied formats

Practise the same skill using different layouts.

For example:

-   track directions using words and diagrams;
-   practise percentages and time calculations;
-   apply logical rules to numbers, shapes and symbols;
-   listen to different speakers and topics;
-   analyse unfamiliar workplace scenarios.

### Practise while being observed

During independent preparation, ask a trusted person to watch one short session without helping.

This can reveal whether observation causes you to:

-   rush;
-   hesitate;
-   change your normal method;
-   lose concentration;
-   become distracted by small mistakes.

Do not use another person during the official assessment unless their presence is expressly authorised.

### Recover after an error

One mistake should not determine the rest of the task.

Practise:

1.  recognising the error;
2.  returning attention to the current item;
3.  applying the method again;
4.  avoiding repeated mental review of the mistake.

Stable recovery is more useful than attempting to perform perfectly.

## Assessment integrity

Air traffic control is a safety-critical career. Integrity during recruitment is directly relevant to suitability.

Candidates should:

-   complete assessments independently;
-   use only permitted materials;
-   provide valid identification;
-   follow observation rules;
-   protect confidential assessment content;
-   report technical problems honestly;
-   answer interview questions truthfully;
-   avoid exaggerating experience or knowledge.

Inappropriate conduct includes:

-   asking another person to complete a test;
-   receiving hidden assistance;
-   using unauthorised notes;
-   recording the screen;
-   photographing questions;
-   sharing assessment content;
-   attempting to bypass observation;
-   inventing qualifications or experiences;
-   presenting another person’s interview example as your own.

## What to do if a technical problem occurs

If a technical problem affects the assessment centre:

1.  remain calm;
2.  follow the instructions supplied by NATS;
3.  tell the assessor or authorised support contact promptly;
4.  describe the problem clearly;
5.  avoid repeatedly reconnecting without guidance;
6.  record the time and error where appropriate;
7.  protect confidential assessment content.

Examples include:

-   loss of internet connection;
-   microphone failure;
-   camera failure;
-   inability to open the test;
-   frozen assessment software;
-   loss of audio;
-   unexpected Microsoft Teams disconnection.

A technical issue does not justify using an unapproved device or receiving unauthorised assistance.

## Workplace adjustments

Candidates who require an adjustment should contact NATS Talent Acquisition as early as possible.

Do not wait until the assessment centre has started.

Possible discussions may concern:

-   communication access;
-   interview structure;
-   timing;
-   technical barriers;
-   visual or auditory access;
-   physical requirements;
-   other barriers affecting participation.

The adjustment available depends on:

-   the candidate’s needs;
-   the competency being assessed;
-   maintaining assessment validity;
-   technical feasibility;
-   the current process.

Do not assume that an adjustment used by another employer or candidate will automatically be available.

## How is Stage 3 scored?

NATS does not publish a universal Stage 3 passing percentage on its main trainee recruitment page.

Candidates should not assume that:

-   the interview has a public numerical cut-off;
-   every component has equal weighting;
-   one strong component compensates for every weak component;
-   the knowledge test has a publicly confirmed pass mark;
-   retesting must match the original score exactly;
-   assessment-centre capacity determines the score;
-   another candidate’s result reveals the current threshold.

Only NATS can confirm the assessment and progression standards used for the applicable campaign.

Focus on demonstrating consistent evidence across the components rather than attempting to reverse-engineer an unpublished formula.

## Three-week Stage 3 preparation plan

### Week 1: research and evidence

#### Research

Review current information about:

-   NATS;
-   controller specialisms;
-   recruitment stages;
-   training;
-   licences;
-   locations;
-   mobility;
-   safety-critical working.

#### Interview evidence

Prepare genuine examples involving:

-   teamwork;
-   responsibility;
-   pressure;
-   communication;
-   feedback;
-   adaptability;
-   mistakes;
-   decision-making.

Use bullet-point notes rather than complete scripts.

#### Retesting

Complete short baseline exercises in the earlier assessed abilities.

Identify skills that have declined since Stage 1 or Stage 2.

### Week 2: active preparation

#### Interview

Practise answering questions aloud.

Ask another person to use follow-up prompts such as:

-   Why did you choose that action?
-   What was your personal contribution?
-   What did you learn?
-   What would you do differently?
-   How did the other person respond?

#### Knowledge

Use retrieval practice.

Explain key topics without looking at your notes, then verify the details against official sources.

#### Retesting

Use varied formats under moderate time pressure.

Focus on:

-   accuracy;
-   stable concentration;
-   recovery after mistakes;
-   instruction reading.

### Week 3: realistic rehearsal

Complete a short mock session containing:

1.  a technical check;
2.  several interview questions;
3.  a brief knowledge quiz;
4.  short exercises drawn from earlier ability areas.

Practise in the intended room and on the intended device.

In the final days:

-   reduce excessive preparation;
-   review only key notes;
-   test Microsoft Teams;
-   confirm the time and time zone;
-   prepare identification;
-   check the meeting link;
-   protect sleep;
-   reread the official instructions.

## Common Stage 3 mistakes

### Preparing only for the interview

Stage 3 currently includes three components.

Candidates should also prepare for the knowledge test and observed retesting.

### Memorising complete answers

Memorised answers can sound artificial and may fail under follow-up questioning.

Prepare evidence and structure instead.

### Learning isolated trivia

Understanding NATS and the controller pathway is more useful than memorising obscure facts without context.

### Using outdated recruitment information

Older NATS documents may describe a different selection process.

Use current official information.

### Neglecting previous test skills

Observed retesting means earlier ability areas remain relevant.

Review them before Stage 3.

### Giving theoretical competency answers

An assessor may ask for evidence from your own experience.

Prepare real examples.

### Claiming that you never make mistakes

The ability to recognise and learn from errors is important in training.

Use an honest example showing accountability and improvement.

### Ignoring the virtual setup

Technical failure, poor audio or an unsuitable environment can interfere with performance.

Complete checks in advance.

### Reading notes constantly

Unless notes are explicitly permitted, do not rely on them.

Even during permitted preparation, answers should remain natural and responsive.

### Treating candidate reports as guaranteed questions

Individual accounts may be outdated, incomplete or inaccurate.

Prepare the underlying themes.

## What preparation can help with

You can prepare credible interview examples, learn the public facts about NATS, practise explaining why the role appeals to you and make sure your technical setup works. You can also refresh the skills from earlier stages so observed retesting does not feel like a surprise.

You cannot know the exact interview questions, hidden scoring criteria or the precise retests in advance. A memorised script is fragile because assessors can ask follow-up questions; understanding your own examples is much more useful.

## What happens after Stage 3?

Candidates who pass may move to the [Stage 4 practical exercise](/nats/nats-stage-4-practical-exercise/), delivered virtually or at Whiteley depending on the campaign. Stage 4 shifts the emphasis again, toward learning a new task, building a situational picture and adapting after feedback.

## Before your Stage 3 session

Check the current invitation for the date and time zone, Microsoft Teams arrangements, identification, permitted materials, any workplace-adjustment instructions and the technical-support route. The [official NATS trainee controller page](https://www.nats.aero/careers/operations/trainee-air-traffic-controllers/) is the best public reference, but your own invitation is the document that matters on the day.

## How to think about Stage 3

Do not try to sound like an air traffic controller already. Stage 3 is about whether you understand the career, can talk honestly about your own behaviour, and can perform consistently when NATS observes you more directly.

Know your examples, know why you want the job, know the public facts you have researched, and leave room to think when the assessor asks something you did not rehearse.