That is definitely one to have mapped out in advance. I'm British and so really awkward about that sort of thing and mumbled in the past. Having been on the other side of the table what is really called is the candidate to forthrightly state what they want e.g. I might work for as little as X in the right role, but am really looking for X + Y. Practise stating such, so that you don't feel quite so out of place if and when the time comes.

This avoids lots of unpleasantness further down the line IMO. Being coy is just storing up mismatched expectations.