
You rehearsed the story. Clean structure, confident delivery, a strong close. You've answered "tell me about a time you dealt with a difficult teammate" a dozen times in practice. Then you walk out of the real interview certain it went well — and the rejection email shows up two days later anyway.
Nobody tells you the question can be identical on paper and scored on two completely different rubrics depending on which side of the Atlantic you're sitting on. If you're applying to UK roles after prepping the American way, or interviewing with a US-headquartered company after prepping the British way, the format tricks you into thinking you're ready when you're actually answering the wrong test.
"Tell me about a time when..." sounds like one universal interview format. It isn't scored the same way in both markets.
Same words, different job. A UK interviewer taking notes against a rubric is not impressed by charm. A US interviewer building a "would I want to work with this person" read is not impressed by a rigid, checklist-sounding answer.
Three things shift the most, and they're the ones candidates get caught out by:

None of these are about being less qualified. They're about which signals the person across the table has been trained to score.
If you're early in your career, you've probably only ever practiced one version of the "tell me about a time" question — whatever your university careers service, a US-based YouTube channel, or a generic interview guide taught you. That's fine if every interview you sit is in the same market. It stops being fine the moment you apply to a UK-headquartered company while every practice rep you've done was tuned for an American panel, or the reverse.
It gets messier still with hybrid panels, which are increasingly common as more companies hire across both markets. You might face a UK-based hiring manager running a strict competency scorecard alongside a US-based team lead who's really just trying to get a read on whether they'd enjoy working with you day to day. Answer purely to one style and you risk under-scoring with the other person in the room — which is part of why generic "just be yourself" advice doesn't hold up once you're actually being evaluated against two different sets of expectations at once.
The fix isn't learning two completely different personalities. It's knowing which evidence to lead with and which tone to dial up or down depending on who's asking — and being able to switch that framing on the fly when a panel is mixed.
This is exactly the kind of shift that's hard to catch by reading advice — you don't notice your framing is off until someone (or something) actually questions you on it. InterviewBee's Mock AI Interviewer runs adaptive, role-specific practice sessions with follow-up questions that probe your answer the way a real interviewer would, so you get instant feedback on whether your evidence, structure, and tone are actually landing — not just whether you covered the topic.
Practice the UK competency format until STAR structure is automatic. Practice the US conversational format until you're not over-tightening a story that's supposed to breathe a little. Either way, you find out before the real interview, not after the rejection email.
Practice this with InterviewBee's AI mock interviewer — free to start. Start practicing
No. UK interviews are more likely to score evidence against a written competency framework, while US interviews often assess rapport, communication style, and team fit alongside the candidate's evidence.
In a UK interview, make each STAR element explicit so the interviewer can map your evidence to the competency rubric. In a US interview, keep the same evidence but deliver it more conversationally so the answer does not sound like a checklist.
US interviewers generally expect direct ownership statements such as "I drove this." In UK interviews, state your individual contribution clearly while also acknowledging the team's role so confidence does not become overselling.
Lead with structured, specific evidence that satisfies a competency scorecard, then adapt your tone and level of enthusiasm to the conversation. Practising both styles makes it easier to switch without changing the substance of your answer.