Preheat the oven to 180 and line a 7 x 9 inch cake tin with greaseproof paper
Put the butter, sugar and golden syrup into a pan and melt it all together over a low heat
Once all the butter has melted and the sugar has dissolved, take the pan off the heat and stir in the oats
Mix everything together really well so all the oats are coated in the buttery, syrupy mixture
Tip two thirds of the mixture into the lined tin and press it down really well with the back of a wooden spoon or a spatula
Spread 2-3 spoonfuls of lemon curd as best you can over the mixture
Add the rest of the flapjack mix on top of the lemon curd and press down well
Bake at 180 for 18 minutes
Leave to cool for a few hours, or even better, over night
Cut into squares and enjoy