Spag Bol. All I can come up with is spaghetti bolognese

That would be it, 'tie - although I'm pretty sure that traditional Brit Spag Bol would have very little resemblance to pasta dishes that are (or have been) cooked in the vicinity of Bologna.

Traditional Brit "Spanish Omelettes" are similarly laughable (basically a vegetable omelette, often with frozen veg ).

Though really I'm talking about 1960s-ish convenience cooking here - times have changed. A bit.