Core Surgical Training Interview Preparation: A 12-Week Plan

Written by the Surgical Steps faculty · Last updated 29 October 2026

CST preparation goes wrong in a predictable way. Candidates spend months on the MSRA, which is worth 10 per cent, and start on the portfolio and the stations — worth 90 per cent between them — once interview invitations are already out. By then the portfolio achievement cut-off has passed and nothing can be added.

This page is a working plan that puts the effort where the marks are. For the dates, eligibility rules and forms for the round itself, read our CST 2027 application and interview guide.

1. Know what you are preparing for

Two consequences follow. The MSRA is a hurdle to clear, not a place to spend months. And the portfolio is not a document you submit and forget — assessors score it in front of you and ask you about it, so you prepare for it twice: once by building the evidence, once by rehearsing the questions.

2. The 12-week plan

3. The MSRA: clear it, do not live in it

The MSRA shortlists — roughly the top 1,200 candidates are invited to interview — and then contributes 10 per cent of the final mark. Practise under timed conditions rather than reading, because the pressure is the difficulty. Book your test slot as early in the window as you can: centres fill, and a late sitting leaves no margin if anything goes wrong on the day.

4. Build the portfolio around the indicators

You record, for each of three domains, an indicator letter from A to E and the evidence category you are claiming:

1. Knowledge, Skills and Development — operative experience from the eLogbook, and surgical experience
2. Patients, Partnership and Communication — presentations, publications, teaching
3. Colleagues, Culture and Safety — quality improvement or audit, and presenting that work

Work backwards from the indicator descriptors. Decide which indicator you can honestly evidence in each domain, then build the evidence to prove exactly that — not a folder of everything you have ever done. Assessors have roughly ten to fifteen minutes per portfolio and review the first items they see, so lead with the document that proves the claim.

Practical points that cost candidates marks every year: supervisors' GMC numbers missing, logbook consolidation reports unsigned, publications without a PubMed or Web of Science reference, and patient-identifiable data left unredacted.

5. Drill the two stations

Management and Clinical

One management scenario and two clinical scenarios, five minutes each, every item scored from 0 to 6. Five minutes is short. Practise answering in a fixed order so you never spend the first minute deciding where to begin: name the issues, state the priority, act, escalate, close the loop.

Portfolio

A three-minute presentation, two minutes of questions, then two five-minute domain questions. Two things catch people out. The presentation almost always overruns the first time it is said aloud, so time it. And the domain questions cover Domains 2 and 3 whether or not you uploaded evidence for them — so prepare answers on teaching, communication, audit and safety culture regardless of what you submitted.

6. Why the mock is not optional

Everything above is content. The interview is a performance under time pressure, on camera, in front of two strangers who are scoring you. Candidates who have only ever rehearsed in their head lose marks to pace, to rambling, and to answering a question other than the one asked.

One full mock, far enough ahead that you can act on the feedback, is the single highest-yield thing in this plan after the portfolio itself.

7. Six common mistakes

1. Treating the MSRA as the main event because it comes first.
2. Waiting for an interview invitation before assembling portfolio evidence.
3. Uploading everything instead of the one achievement that proves the indicator.
4. Preparing only the domains you submitted evidence for.
5. A portfolio presentation that runs over three minutes.
6. Leaving the diagnostic equipment test to the morning of the interview.

8. Common questions

How long should I spend preparing for the CST interview?

Twelve weeks is comfortable for most candidates. The binding constraint is not study time but the portfolio achievement cut-off, which falls months before many people start.

How much does the MSRA count for CST?

It is the shortlisting score and contributes 10 per cent of the final mark. The two interview stations carry 45 per cent each.

Can I still add portfolio evidence after I am invited to interview?

No. Achievements must be completed by the published cut-off, which falls within days of invitations being issued.

Will I be asked about domains I did not submit evidence for?

Yes. The portfolio station includes questions on Domains 2 and 3 regardless of what you uploaded.

Is a mock interview worth it for CST?

Ninety per cent of your score is decided on interview day across two stations. Rehearsing those conditions once, with scoring and feedback, is the highest-yield preparation available in the final month.

Applying for higher surgical training too? See ST3 interview questions and how to answer them and the ST3 2027 guide.