Ah, trifle! For me the single most important rule of a trifle is - NO JELLY! Yuk. But everything else, well, what can one say about Madeira sponge sandwiched with redcurrant jelly, then drenched in sherry, a layer of pureed and chopped strawberries with some just-poached blueberries folded through, then a proper vanilla egg custard (or Bird's, I don't mind!) and a billowy layer of softly-whipped cream, topped with finely-grated chocolate. You want a bowl, don't you? Right now. Then another one......I'm not stopping you.