UK Interview Format
How to prepare for a UK Case Study Interview
Duration
30-45 minutes per case
Difficulty
Hard
What it is
Case study interviews present a business problem — usually based on a real or stylised client situation. The interviewer expects you to: clarify the question, structure your approach, gather information through asking the right follow-up questions, do the maths or qualitative analysis live, and conclude with a recommendation. The interviewer scores structured thinking, business judgement, quantitative comfort, and communication. Typical UK consulting case formats include market sizing, profitability, M&A, market entry, and operations.
Who uses it
MBB (McKinsey, BCG, Bain) and Big 4 strategy practices. Boutique strategy consultancies. Senior product manager roles (especially at consultant-friendly companies like Stripe, Atlassian, growth-stage SaaS). Some senior finance roles (FP&A, strategy, M&A advisory). Increasingly in senior commercial roles at scale-ups for go-to-market and strategy positions.
How to prepare (step-by-step)
- 1 Read 'Case in Point' (Cosentino) or 'Case Interview Secrets' (Cheng) — canonical UK consulting case prep books.
- 2 Practise 20+ cases with a partner via Preplounge, RocketBlocks, or peer practice.
- 3 Develop a flexible structure (issue tree, profit equation, customer-product-channel) — don't rely on a single framework.
- 4 Practise mental maths under pressure — UK consulting cases test quantitative comfort heavily.
- 5 Develop your hypothesis-driven approach — start with a hypothesis early and test it through analysis, rather than waiting for full information.
- 6 Practise reading the interviewer for hints — they'll guide you if you're getting too lost.
- 7 Prepare a tight closing recommendation: 'My recommendation is X, based on Y, with the main risk being Z.'
What this format assesses
- →Structured thinking — can you decompose an ambiguous problem systematically
- →Quantitative comfort — can you do reasonable estimation and arithmetic live
- →Business judgement — do your hypotheses and recommendations match how businesses actually work
- →Communication under pressure — can you think aloud while staying organised
Common mistakes
- ✗Forcing a generic framework on every case — the case-specific tailoring matters more than memorised structures
- ✗Math errors under pressure — sloppy arithmetic flags quantitative weakness
- ✗Going silent when stuck — interviewers can't help and can't score
- ✗No closing recommendation — leaving the case unfinished signals lack of structure
- ✗Ignoring qualitative elements — UK consulting cases value people, culture, and execution as much as numbers
Recruiter pro tip
The single highest-leverage case interview move is the structuring phase. Spend 90 seconds at the start drawing your structure on paper or describing it aloud. Strong consulting interviewers explicitly score this; weak candidates skip it and try to ad-hoc through the case. The structure is the one part of the case where you have the most control and where the interviewer most clearly sees your thinking. Invest there first.