Preheat the oven to 180 degrees C and grease and line a 25 cm x 30 cm Swiss roll pan.
Beat the eggs in a bowl till pale and creamy. Add the sugar in batches, beating alternately to dissolve the sugar.
Fold in the flour and the hot water. Pour the batter into the prepared pan and bake for 8-10 minutes.
Turn out the warm roll immediately on a tea towel or parchment. Using a spatula or palette knife, slather generously with lemon curd (reserving about a third). scatter the cherries evenly all over.
Using the short side of the tea towel or parchment, gently but firmly roll the sponge. Transfer carefully on to the serving platter and smother evenly with the remaining lemon curd and decorate with a few cherries. Chill for at least an hour before slicing the roll.