NHS INTERVIEW GUIDE

"Tell Me About a Time You Made a Mistake": How to Answer in an NHS Interview

How to choose, structure and reflect on a real mistake in an NHS interview, with duty of candour explained at principle level and sample answers for several roles.

Last updated 24 October 2026 · Created by a practising NHS doctor · Independent of the NHS

Quick answer

How do you answer "tell me about a time you made a mistake" in an NHS interview?

Choose a real, proportionate mistake that did not cause serious harm. Use STAR: briefly set the scene, own the mistake, then explain how you kept the person safe, told your senior, were open with those affected and reported it under local policy. Finish with what you reflected on and the specific change you made. Panels are testing honesty, safety and insight.

Key takeaways

Pick a genuine mistake with a clear lesson, not a disguised strength.
Show immediate safety steps and escalation first.
Mention openness with the person affected and incident reporting.
End with a specific, lasting change to your practice.
Keep patient details anonymous and never blame others.

To answer "tell me about a time you made a mistake" in an NHS interview, choose a real but proportionate mistake, own it plainly, explain what you did straight away to keep people safe and put it right, and finish with what you learnt and changed. The panel is testing honesty, insight and patient safety, not whether you are perfect.

This guide covers what the panel is listening for, a simple STAR structure for mistake questions, how the duty of candour and reflective practice fit in, how to handle the related question "tell me about something that went wrong", and short sample answers for nurses, healthcare assistants, admin staff and allied health professionals.

In this guide

Why do NHS interviewers ask about mistakes?
How do you answer "tell me about a time you made a mistake"?
What mistake should I talk about in an NHS interview?
How does the duty of candour fit into your answer?
How do I answer "tell me about something that went wrong"?
Worked STAR example: Band 5 nurse
Sample answers for other NHS roles
Practice questions on mistakes and things going wrong
Common mistakes when answering this question
How to prepare for mistake questions

Why do NHS interviewers ask about mistakes?

Panels ask because everyone in healthcare makes mistakes, and safe services depend on staff who notice them, speak up and learn. Someone who says they have never made a mistake can sound either unaware or unwilling to be open, which is a bigger worry than the mistake itself.

The question links directly to the NHS values, especially honesty, compassion and commitment to quality of care. It also reflects professional codes for registered staff, which expect openness when things go wrong.

Honesty: do you take responsibility without blaming others?
Safety: did you act quickly to protect the patient or service?
Escalation: did you tell the right person and follow local policy?
Reflection: can you explain what you learnt and what you now do differently?

How do you answer "tell me about a time you made a mistake"?

Use the STAR method, but give the most time to Action and Result, because that is where your safety and learning show. Aim for about two minutes.

Situation: brief context, with no identifiable patient details.
Task: what you were responsible for.
Action: what the mistake was, how you realised, and the immediate steps you took: checking on the person, informing your senior, being open with those affected and reporting it through the local incident system.
Result: the outcome, what you reflected on, and the specific change you made to your practice or the team's process.

What mistake should I talk about in an NHS interview?

Pick a genuine mistake with a clear learning point that you handled well and that did not cause serious harm. It should be recent enough to be relevant but old enough that you can show the change has stuck.

Good choices: a missed or delayed task, a documentation error, a communication slip, a booking or filing error, or not escalating as early as you now would.
Avoid: anything involving dishonesty, a serious incident still under investigation, or a mistake you would struggle to discuss calmly.
Avoid fake mistakes: "I care too much" is not a mistake, and panels notice.

How does the duty of candour fit into your answer?

The duty of candour means being open and honest with patients, or those close to them, when something goes wrong with their care, including offering an apology and explaining what happens next. Showing you understand this principle strengthens any mistake answer.

Registered professionals have a professional duty of candour set out by their regulators. Health organisations also have legal duties, and the detail and terminology differ across England, Scotland, Wales and Northern Ireland, so check the arrangements where you will work. At interview, you do not need legal detail. It is enough to show that you would tell your senior, follow local policy, record it accurately and support the open conversation with the person affected.

Many panels also listen for a just and learning culture: reporting incidents so the system can learn, rather than hiding them out of fear.

How do I answer "tell me about something that went wrong"?

This version is wider. The problem might not have been your personal error, so describe your part honestly, show how you helped put it right, and focus on the learning for you and the team.

Good examples include a handover that missed key information, a clinic that overran, or a process gap you spotted and helped fix. Avoid blaming colleagues. Say "we" where the team was involved and "I" for your own actions.

Worked STAR example: Band 5 nurse

This illustrative answer was written for this guide. Adapt the details so they are true to you.

Example answer: Band 5 staff nurse

Situation: On a busy medical ward I was looking after six patients on a late shift.

Task: One patient was due a regular medicine at 6pm, and it was my responsibility to give it.

Action: I was called to help with a deteriorating patient and, when I returned, I moved on to my next task and missed the dose. I realised about an hour later when checking the chart. I checked the patient straight away, told the nurse in charge and contacted the doctor, who reviewed the plan. I explained to the patient what had happened and apologised, documented it and completed an incident report in line with trust policy.

Result: There was no harm to the patient. I reflected with my preceptor and now do a quick chart check after any interruption, and I raised the issue of interruptions during medicine rounds at our team meeting, which led to the ward trialling a 'do not disturb' tabard.

Sample answers for other NHS roles

Healthcare assistant: "I once recorded a patient's fluid intake on the wrong chart after a bed move. I noticed at the end of my shift, told the nurse in charge, corrected the record with a dated note and explained it at handover. Now I double-check the name band against the chart every time I document."

Admin or receptionist: "I booked a patient into the wrong clinic because two clinic codes looked similar. When she rang to check, I apologised, told my supervisor and found her a slot that week. I suggested we add colour labels to the booking template, which the team adopted."

Allied health (physiotherapist): "I gave a patient a home exercise sheet without checking it matched his updated plan. When I spotted it at review, I explained, apologised, replaced the sheet and reported it. I now confirm the plan with the patient before handing over any written advice."

Practice questions on mistakes and things going wrong

Tell me about a time you made a mistake at work.
Tell me about something that went wrong and what you learnt.
What would you do if you made a medication error?
Describe a time you had to admit you were wrong.
What does the duty of candour mean to you?
Tell me about an incident you reported. What happened next?
What would you do if a colleague made a mistake and asked you not to say anything?
How do you use reflection to improve your practice?
Tell me about feedback you received that was hard to hear.
What does a just and learning culture mean to you?

Common mistakes when answering this question

Saying you cannot think of a mistake. It suggests poor insight.
Choosing something trivial or disguised as a strength. It sounds evasive.
Blaming others or the system without owning your part.
Skipping the immediate safety steps and jumping to the lesson.
Ending without a concrete change. "I learnt to be more careful" is too vague.
Sharing identifiable patient details. Keep it anonymous.

How to prepare for mistake questions

Write down two or three possible examples, then test each against the STAR structure. Look at any reflective accounts you have written for revalidation, appraisal or your portfolio, as they often contain ready-made learning points. Practise aloud so you sound calm and matter-of-fact rather than defensive.

Line managers, practice educators, trust or university careers services, NHS Jobs advice and unions or professional bodies such as the RCN, Unison and the BMA can help you sense-check an example. Healthcare Interview Prep is a self-study resource with written practice questions and model answers for 471 NHS roles, with the first 8 free for each role. It does not offer live coaching, so pair it with practising out loud with a mentor or peer.

Frequently asked questions

Is it OK to talk about a clinical mistake in an NHS interview?

Yes, if it was handled safely and openly and you can show clear learning. Many panels expect clinical staff to have a clinical example. Choose one that did not cause serious harm, keep all patient details anonymous, and focus on the immediate safety steps, escalation, being open with the patient and the change you made. Avoid anything still under investigation or that you find hard to discuss calmly.

What if I genuinely cannot think of a mistake I have made?

Think wider than big errors. A missed task, a communication slip, a delayed escalation, a filing error or misreading a priority all count. If you are new to work, use a placement, volunteering, study or previous job. Saying you have never made a mistake can sound like a lack of insight, so it is worth taking time to find an honest example with a clear lesson.

What is the duty of candour in simple terms?

It means being open and honest with patients, or those close to them, when something goes wrong with their care. That usually includes telling them what happened, apologising, explaining what will happen next and supporting them. Registered professionals have a professional duty set by their regulators, and organisations have legal duties that differ across the UK nations. At interview, the principle and following local policy is enough.

Should I say sorry in my answer about a mistake?

Showing that you apologised to the person affected is good, as it reflects openness and compassion. Saying sorry is not the same as admitting legal liability, and NHS guidance generally encourages a genuine apology. You do not need to apologise to the panel itself. Keep the tone calm, factual and focused on what you did to put things right and prevent a repeat.

How long should my answer about a mistake be?

Aim for around two minutes. Keep the Situation and Task short, then spend most of your time on what you did once you realised, how you escalated and were open, and what you changed afterwards. If the panel wants more detail, they will ask follow-up questions, so it is better to be clear and concise than to tell every detail of the story.

Practice question banks for related NHS roles

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Healthcare Interview Prep is an independent NHS interview preparation website. It is not affiliated with, endorsed by or connected to the NHS. Example questions and answers are original practice material, not official or leaked interview questions.

Healthcare Interview Prep: practice questions and model answers for 471 NHS roles across 11 sectors, created by a practising NHS doctor.