My dad used to buy tins of pilchards, or sardines, and mash them up with malt vinegar. Sandwich time.
Now there's something I could enjoy from my youth.
Mostly though, I remember dishes from school and shiver uncontrollably. Fish (cooked for about 3 hours) in white sauce. Lancashire hot pot (I only ate the potatoes).Flummery (something between a floppy blancmange and an over-set jelly). Suet pudding. Spotted dick; so heavy, you could use it as a medicine ball.
Ahhh - here's one I used to enjoy: Sausage Lyonnaise - basically, British bangers drowned in an onion and gravy sauce. Yep, I'd revive that one.