You'll usually get battered sausage (smaller ones only), and often saveloy which looks like smoked sausage but might well not be that similar. Chicken and mushroom and steak and kidney pies are pretty common but not universal, and never deep fried. Depending on region curry sauce, peas, beans and gravy are often available and kept warm so no need to microwave.Whilst I do enjoy a fish supper, I generally prefer to go for sausage or pudding suppers. Are these offered down in England as well? I never realised how differently some of the chippies are run compared to up here!
Edinburgh/east of Scotland chippies are probably more different than chippies in the rest of Scotland Scotland, but the battered burgers, king ribs, white pudding, chipsteaks and haggises are all quite characteristically Scottish