Mushy peas not on fish here Lyle, only with meat pies, although I have them as a veg. The Brits love mushy peas and curry sauce/gravy with their fish and chips, yuk. Yes, coleslaw, tartare sauce, malt vinegar with fried fish.
When I was on Coral Princess recently, one lunch time it was English or was it British Pub lunch in the MDR, they did me a nice gluten free battered fish and chips, on request, mushy peas were optional, lol.