Flapjacks

Flapjacks were probably the first thing that I ever learnt to cook when I was about 4 years old. I have recently rediscovered them because they are so incredibly easy to make. One conundrum that I have not yet fully resolved is the question of why M&S flapjacks always taste so much nicer than the ones I make at home. My sister told me a while back that the secret ingredient is condensed milk, but I've never been able to find a good recipe that uses it. So I decided to make one up - here it is. If you have any suggested refinements, please let me know if the comments.
Ingredients
300g rolled oats100g butter75g soft brown sugar120ml condensed milk60ml golden syrup
Preheat the over to 180C. Place all of the ingredients except the oats into a large bowl and microwave for 3 minutes until the butter and syrup have melted. Stir well to ensure that the ingredients are fully mixed, and then stir in the oats. Once the oats are fully coated in the liquid, turn the mixture out into a small, lined tin (roughly 20cm by 20cm) and press down with a spatula or palette knife until the mixture is evenly spread across the tin. Place in the oven and bake for 15-20 minutes. As soon as you've taken the flapjacks out of the oven, use a knife to mark out 16 squares. Allow the flapjacks to cool in the tin and then turn out.
UPDATE: My friend and former colleague Emma has tried this recipe and recommends boiling the ingredients before adding the oats so that they start to caramelise.