I got this once. I was equivocating, and then the guy was like, well, you're gonna give us your P60 when you join anyway, so you might as well tell me.

I was like, okay, fair enough.

I played it completely wrong though. I should have just reframed it and said, well, I paid this, but you're not competing against my current employer, you're competing against Meta, who I'm also interviewing with this week.

i'd also like to ban asking for a salary expectation. it puts you in a very weak bargaining position. also my expectation depends very much on the type of work i'll be doing. i'll accept a lower salary for a good job and work environment, but i won't know that until after some interviews.

A candidate can just make up whatever number they want to respond though. Most candidates I interview usually say what they want to get, not the real number.