According to the BBC, some are facing a drop of 30% in custom and face 'extinction'. www.bbc.co.uk/news/uk-england-somerset-62650572
Personally, I wouldn't buy a meal from one nowadays, a small haddock and chips costs £8.50, 1/4 of my weekly shop (live alone).
I know from previous threads they tend to be cheaper in the North of England, but even so all of them are having to pay more for oil, fish & spuds.
Have any closed down near you?