Scallop - collop in Leeds and surrounding area. Isn't a pattie fish and mash mixed and fried in batter? And isn't what we in the West Riding call a fishcake (fish between two slices of potato and fried in batter) called a fish sandwich in Hull? As for scraps - they're certainly scraps in Leeds, bits in the Huddersfield area (there's even a chippy at Mirfield called "Wi' Bits" ) and thanks to my days as a plastic Wiganer - scratchings in Wigan.
As for the Ridings, the term West Riding which when I was a kid was ubiquitous has almost disappeared except for signs around Clitheroe and Saddleworth saying "Historic West Riding of Yorkshire." The one place the ridings haven't disappeared from is Brid - you see East Riding Council everywhere - good for them.
If you went to Scarborough from Leeds before 1974, you travelled to York through the West Riding, then through York which wasn't in any riding, then you entered the North Riding until you got to Malton and crossed the Derwent and entered Norton and the East Riding, you crossed again into the North Riding before getting to Scarborough, but I'm not sure just where - somewhere around Seamer? Scarborough now includes Whitby which was in the North Riding and Filey which was in the East Riding.