Fold half into the custard. Coarsely break 6 of the biscuit and place in a trifle bowl. Add half the rhubarb. Spread over half the custard cream and then slice up half the jelly. Repeat and then ...
Cut the Swiss roll into 12 equal slices and arrange them over the base and a short way up the sides of a glass trifle bowl. Put any remaining slices in the middle of the bowl. Spoon the sherry ...
But according to the store, this isn't just any old dessert or trifle. This one is deluxe (you'd bloody hope so) boasting "generous layers of strawberry marsala jelly, lemon curd, strawberry gel ...