The job interview question you don't have to answer

When interviewing or deciding on new staff, employers must not discriminate against an applicant based on so-called protected characteristics, including age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, and sexual orientation.

Sometimes it feels like interviewers, and interviewees, tip-toe around the subject of money.

But Louise Rudd, a senior adviser at the workplace advice and conciliation service Acas, says there are no regulations that prevent employers from asking interviewees about their current salary, or their salary expectations.

She says employers, if they do want to know, should ask each applicant the same questions to ensure they are treated fairly.

A few years ago, a campaign was launched urging employers to stop asking new recruits how much they were paid in their previous jobs. It had its own hashtag - #EndSalaryHistory.

The Fawcett Society, which campaigns for women and gender equality, said that asking the question risked maintaining historic unfair differences in pay due to gender, race and disability inequality.

Rather than offering a salary based on skills, experience and performance, it meant employers rewarded an individual's perceived worth and negotiating skills instead, the society said.

When you're going for a new job, you can reveal your current salary if you are happy to.

Some people asked by BBC News out and about in London suggested they would reply with an inflated salary - so they get paid more in the next job. However, the risks of lying in an interview can far outweigh the possible reward.

There are no requirements for you to disclose your salary if you don't want to.

Rudd says some people might prefer to give their salary expectations, or outline their understanding of the salary range for the role.

Recruitment firms often say applicants could instead focus on their skills and experience, so those are used as a measure of what they should be paid, not their salary history.

Shazia Ejaz, director of campaigns at the Recruitment and Employment Confederation, says jobseekers should approach questions about pay with "realism but also confidence".

"Candidates can focus on showcasing the value they bring, the benefits that matter most to them and to go to the interview knowing the market rate for the role," she says.

"Jobseekers who have done their homework on salaries and can explain the contribution they will make are in the strongest position to secure the right package."