You forgot to mention, Carrust, that (whereas people in other parts of the country order 'Cod and chips', 'Haddock and Chips' or 'Plaice and chips', etc), in Sheffield it's often ordered simply as 'Fish and chips',with no type of fish specified, even on the menu!
(Except, of course, that it's not! Nobody in Sheffield ever really orders 'Fish and chips'. It's always 'Chips & fish'!).
Further, you omitted to indicate what you have to order in Sheffield if you actually want what the rest of the country (and frozen food manufacturers) call a 'fish cake'. That, of course, is a 'rissole' ;-)
At least Sheffielders know what 'pie and peas'; should be though. (i.e. meat and potato pie, served with mushy peas). Up the road in Huddersfield you get served a hot pork pie, with all the fat and jelly running out and congealing in your mushy peas. Yuck!
Once you've finished your fish or pie in Sheffield though, you might desire something sweeter and be lucky enough to receive the offer of "Do'st thou wanna spice?". For the uninitiated, that means that you're being invited to take a sweet from the packet offered to you. The exact type doesn't matter; irrespective whether there are jellies, toffees, mints or liquorice allsorts in the bag, it's all 'spice' in Sheffield. (Just as they're all 'toffees' in Manchester).
Or you could go round the corner to the baker's shop in Sheffield and order some 'bread cakes' (which are known as 'baps' in most other parts of the country!). While you're there, why not buy some 'pikelets' as well?
;-)