The best sponge for a trifle, IMHO, is a sliced swiss roll. Fresh raspberries and/or strawberries, definitely not tinned fruit cocktail! Vanilla custard and whipped cream topped with chopped or flaked nuts. I can't have this glorious concoction or, at least, not the cream which, as I discovered last Christmas, has unpleasant consequences for me.
Retiring and living frugally in money from downsizing after years of stress





. I would have expected them to sink into the custard. Certainly easier, as there's no faffing about waiting for the custard to cool to the right temperature to poor on top of the jelly without melting it. I shall have to try it!
