Never been asked in an interview - that is plain bad manners - but it is a standard question on many online application forms, including the NHS and other public bodies, where salary is banded.
BBC News - The job interview question you don't have to answer
www.bbc.co.uk/news/article...
bbc.co.uk
The job interview question you don't have to answer
Experts explain what you should do if you are asked for your current salary during a job interview.