Quintessential British celebration dessert: sponge cake soaked in sweet sherry and fruit juices, layered with sweet strawberry jelly, thick vanilla custard, whipped double cream, and toasted flaked almonds.
Arrange sponge cubes in base of a deep glass trifle bowl. Drizzle evenly with sweet sherry.
Scatter sliced strawberries over sponge. Pour liquid strawberry jelly over and chill for 2 hours until firmly set.
Spread cold thick vanilla custard smoothly over the set jelly layer.
Pipe or spoon billowy whipped cream over custard. Scatter with toasted flaked almonds and chill until serving.