Chicken drum sticks, cornedbeef and potato pie. buffet size sausage rolls,sandwiches,bowls of cole slaw,crisps,stuffed eggs(cut hard boiled eggs in half longways, mix yolk with salad cream put back in and put a strip of green and red pepper on top)Quiches.If you want a desert Cheesecakes.You can buy cheap cheesecake mix which is very nice topped with fresh fruit or tinned pie filling.
I went to one not long ago for a friend of mine and they had it in a pub with a buffet of cold carvery meats, ham, beef etc... with some quiche and lots of salad items eg cherry tomatoes, coleslaw, potato and pasta salads and such and some nice bread.
Made it more of a meal that bits and pieces and people were all sitting down together and talking and reminiscing and it was really nice (in the circumstances).
Have a chat with your local butcher - I bought a large ham from mine for a recent buffet, and they said that once I'd cooked it, if I took it back they'd slice it all up and set it out on the platters for me - excellent!
Good meats, good cheeses (kids like cheese cubes I find) salady stuff like coleslaw, cous cous and pasta or rice salads. I also find that a nice tray of fresh fuit goes VERY well (fresh pineapple, mango, kiwi, figs etc) .