Set oven to gas mark 3, 160 C.

Grease a 20x30cm baking tray and line the bottom with baking parchment.

In a large saucepan melt butter, sugar and syrup until all mixed and runny.

Take the saucepan off the heat and stir in the oats until all combined.

Pour the mixture into the prepared baking tray and smooth even with a spatula.

Place in the centre of the pre-heated oven and bake for 20 - 25 minutes, until golden. (If you prefer a more chewy flapjack, it should still have a slight wobble when you take it out of the oven).

Allow to cool in the tin for 15 minutes, then mark lightly where you want to cut into squares. Cover with a clean tea towel until completely cooled.

Cut into squares and turn out.