6. Spread out a piece of parchment paper (slightly larger than the tin in size) on a work surface and sprinkle evenly with caster sugar (this stops the roll from sticking to the paper). Turn or invert the pan onto the sugared parchment paper, and then carefully remove the tin and parchment paper from the bottom of the cake.
7. Place a slightly damp, clean tea or kitchen towel over the cake while it cools- this will prevent it from drying out and cracking when you roll it.
8. When the cake is cool, spread the jam sparingly over the cake, leaving a 1-inch border. Repeat with the whipped cream. With the longest side facing you, roll up the Swiss roll away from you, then transfer to a plate to serve. Sprinkle the cake with caster sugar or dust with icing sugar to finish.