Add sugar and water to a small saucepan and bring to the boil making sure sugar is dissolved

Make the jelly and allow to cool but not set

Cut the jam roll into 1 cm slices and place in the trifle bowl

Pour the syrip over the jam rolls. Skip this step next time and see if the trifle is less wet

Add the blackberries to the jam rolls (which form a kind of bowl for them(

Pour the jelly over the blackberries and jam rolls and refrigerate to set

Make the custard with 8 tbsp of custard powder, 4 tbsp of sugar and 1.5 l of milk. This is 3/4 of the recommended quantity of milk on the packet.

Pour the custard over the set trifle and refrigerate.

Decorate with a layer of whipped cream