Put the flour and butter into a bowl and rub together to form breadcrumbs
Add the egg to bind and a little water if needed. Wrap and chill for 30 minutes
Heat oven to 200C
Roll out the pastry and line a butter 20 flan dish . Prick all over
Bake blond for about 20 minutes
In a large panels the golden syrup , butter and sugar
Remove from the heat and stir in the cornflakes
Spread the jam over the base f the cooked pastry
Top with the cornflake mix and put back in the oven for 5 minutes so the mixture sets