OK, I would like to try this recipe, but converting from grams to American measurements is very difficult.

As best I can determine:
200g butter equals 0.88 cups of butter.
If you use Maple syrup for the 175g golden syrup, use 1/2 cup. (really 0.54cup)
For 75g brown sugar, use 1/3 cup packed brown sugar (really about 0.34 cup)
for 250g rolled oats, use 1 1/2 cup (really about 1/6 cups)

I hope that helps for all of us in the USA with our household measurements!