Well typically all food that is cooked the day before the event tastes weird on the day of the event or next day. I think having fresh cooked food would be better specially if their sandwiches those arent too complicated

I would do the sausage rolls and cocktail sausages and refrigerate overnight. Do not put the cocktail sausages in sauce until the morning. Even make the ham and cheese sandwiches, dampen a paper towels and put on top and refrigerate cover with foil or wrap.. Add jam before party..I assume you bake these. I would add some healthy alternatives, like apple slices (cut and toss in lemon juice to preserve). Have fun and treasure every moment with the children.

Ok so I am making party food for a childrens party tomorrow and was wondering if I would be able to start preparing any of it tonight as I may not have time to do it all in the morning. I need to make sausage rolls, cocktail sausages and cheese, jam and ham sandwiches but if I do them tonight will they be fresh enough to eat tomorrow? if I make the sandwiches tonight should I keep them in fridge or not? or is it best to do it all in the morning? any advise would be appreciated thankyou!