I think I'd make a point of going in and asking if they want people to wear masks, and if they say yes, make it clear I am taking my business elsewhere.At Intake chip shop in Doncaster, there were signs saying ‘you must wear a mask; only one person in the shop at a time’. Naturally I went to Queens chippy in Armthorpe, where there were no signs and the mini-fish was huge.
I am not masking anywhere in the UK again*; any business that mandates it will lose my custom and I am keen for virtue signallers to know that they are losing custom; I am not afraid to tell them!
(* the one exception to this may be if planes are mandating them and if Eurostar isn't a viable option to get around it)