The on-board selection process, end to end

There is no national standard — and that matters

Train driver selection in Britain is nationally standardised. There is an RSSB rail industry standard covering psychometric assessment in train driver selection, and operators work to it, which is why driver candidates can be told with confidence what tests they will sit.

No equivalent standard exists for conductors and guards. Conductors who dispatch trains and work doors are safety-critical workers in law — the Railways and Other Guided Transport Systems (Safety) Regulations 2006 define safety-critical work to include dispatching, and that brings medical fitness, drug and alcohol screening and competence management with it. What the law does not do is prescribe a psychometric battery.

The practical consequence is that on-board selection has converged on one supplier without being standardised. Most operators buy from the same occupational psychology publisher — the Occupational Psychology Centre, OPC — so the same handful of test names comes round again and again, but each operator picks its own subset, and two operators a county apart can assess you completely differently. Most do not say which subset they use: West Midlands Trains and LNER are the exceptions that name their tests outright. Your invitation letter is the only authority for your process.

Stage one: the application

Almost every operator screens on the form itself. Northern puts competency-style questions inside the application form, and several operators now run an automated or AI-assisted screen in front of a human. At TransPennine Express that is a chat-style AI interview — you type answers to open questions before you sit any test at all.

Two habits pay off here. Write your competency answers in full STAR form (situation, task, action, result) even when the box looks small, and keep a copy — you will be asked the same things again at interview, and contradicting your own form is an avoidable way to lose points.

Stage two: the online or assessment-day tests

This is where the operators diverge most. The modal pattern is a rules test paired with a concentration test, often with ticket checking and a numerical element alongside. Some operators run all of this online; others sit you down at an assessment centre and run it on paper.

Rules test — usually the RAAT

Learn an unfamiliar rule set, then apply it exactly. The Rules Acquisition Aptitude Test (RAAT) is the version most operators buy. West Midlands Trains and LNER both name it on their own careers pages, and South Western Railway’s published assessment stage describes tests of “concentration, rule-following and awareness”. Applicant accounts add GWR, Transport for Wales and CrossCountry.

Concentration test — usually the SCAAT

Timed symbol-scanning sheets that get harder, most often the SCAAT. LNER and West Midlands Trains both name it on their own pages; South Western Railway describes the same thing without naming it. Applicant accounts add GWR, Transport for Wales, TransPennine Express and Merseyrail. Not practised on this site.

Ticket checking — the TCT, or the TSCT with fares

Valid or not, and why. Sold as the Ticket Checking Test (TCT), or as the Ticket Selling and Checking Test (TSCT) where fare calculation is included. West Midlands Trains names the TCT on its own careers page. Applicant accounts add GWR, Transport for Wales, CrossCountry and Southeastern.

Fares and numeracy

Excess fares, change, percentages, charts. Used at Northern, GWR, CrossCountry and Merseyrail.

Situational judgement

On-train dilemmas. GWR now runs one at the application stage, before anything else. Applicant accounts report one at West Midlands Trains too, though it is not among the three tests West Midlands Trains names itself.

Something else entirely

Southeastern runs a Group Bourdon-style concentration test and a role play instead of a rules test, though accounts differ on whether it still uses dots or has moved to letters. Southeastern and East Midlands Railway both now put a gamified behavioural assessment in front of everything else. ScotRail names no test at all but does send practice booklets in advance.

Stage three: the group exercise

Several operators run a group exercise as part of the day, and several say so themselves: Chiltern watches how you work in a group as well as on your own, East Midlands Railway sets group and individual tasks, and GWR’s assessment day includes group exercises. Merseyrail and Grand Central run one too, and applicant accounts describe it as must-pass at Chiltern and Grand Central.

Assessors are not looking for the loudest person in the room. They are looking for somebody who brings quieter people in, keeps an eye on the time, summarises where the group has got to, and does not need to win. Those are the same behaviours that make a conductor useful when a train is full and late.

Stage four: the competency interview

Every on-board process ends in a competency interview, usually explicitly STAR-format. The themes repeat across operators: safety over schedule, customer service under pressure, handling conflict, working alone, reliability and attendance.

It is the one stage no operator skips, and the one you can prepare for without knowing which supplier your operator uses. There is a separate guide on it.

Stage five: the talent pool, and the wait

This is the stage nobody warns you about. Passing does not mean starting. LNER publishes a maximum of twelve months and East Midlands Railway the same; Avanti’s own vacancy wording says a talent bank of up to 24 months. Most operators publish nothing, and the figures that circulate for them are single applicant posts, sometimes years old.

At CrossCountry applicants describe the bottleneck as the pool rather than the tests: recruitment into it is heavy and the wait afterwards is long. Plan for the wait wherever you apply — keep your current job, keep your references warm, and do not turn down other applications on the strength of a pool place.

Stage six: the medical

A conditional offer is followed by a safety-critical medical including drug and alcohol screening. Colour vision is checked — South Western Railway does it with Ishihara cards on the assessment day itself, before anything else. There is a separate guide on the medical and the legal framework behind it.