Don’t say “most won’t” say “you may be charged although most merchants won’t”
It’s a lot nicer to give someone an obvious heads up that they may be paying card fees still, a year after they’ve been outlawed for the rest of the country!
You are indeed correct though, most do not. Some do though! Like British Airways and a few takeouts that I know.
1% of £20 every time you spend over a year isn’t cheap. Neither is 1% as BA or some other airlines charge you for usage of these. It’s actually quite a premium to pay on flights of £700+