The interviewers want to make sure all your questions about the NHS or job role are answered during the interview. It is best to ask at least a question or two, showing the interviewers your eagerness to learn all you can. Of course, you want to review the job announcement and research the NHS beforehand so you are not asking questions that could be answered during your research.
Focus on asking questions specific to the role you are interviewing for or the company culture and work environment. Examples of good questions include asking the interviewers how you performed in the interview, if you need to clarify anything, what the interviewers like most about working for the NHS, or if they have any hesitancy about hiring you. To make yourself stand out, thank the interviewers at the beginning of your response for letting you ask questions. They will think that it is respectful and it shows you have good manners.