Roll back up again and slice one into 2.5cm ... Instead of the St Clement’s jelly, use 1 packet of lemon-flavoured jelly and follow the packet instructions to make 568ml/1 pint.

Though they may at first sound like different names for the same thing, there are real difference between a jelly roll pan ...

For the Cake: For the Lemon Cream Filling: For the Glaze: Prepare the Cake: Preheat your oven to 350°F (175°C). Line a 10x15-inch jelly roll pan with parchment paper and lightly grease it.