Structure and format differences
US interviews lean heavily on behavioral and STAR-style questions across multiple one-on-one rounds, often including a dedicated 'culture fit' conversation. UK processes more often include a formal assessment centre for graduate and structured schemes, group exercises, and competency-framework questions that map closely to a published set of criteria, which rewards candidates who can name the specific competency they are demonstrating.
Tone and self-promotion
US interviewers generally expect confident, direct self-promotion, stating an achievement like driving a 20 percent increase lands well. The same delivery in a UK interview can read as arrogant if it is not softened with context or a nod to the team, UK candidates who succeed often frame achievements as 'we' before pivoting to their specific contribution. Neither style is wrong, but using the wrong one in the wrong market costs you.
Mistakes candidates make crossing between the two
US candidates interviewing in the UK sometimes come across as over-selling and get marked down on team fit even with strong answers. UK candidates interviewing with US companies sometimes undersell achievements out of habit and get read as lacking confidence or ownership. Adjust your framing to the market, not just the words.