this is DW's secret recipe, but since you're in UK she thinks it may be safe . . . .
+/- 36 cookies; depends on cutter size
0.5 lb / 227g unsalted butter
1 cup / 200g white granulated sugar
2 eggs - lightly beaten
3 cups / 390g AP flour
2 teaspoons / 10g baking powder
1 teaspoon /5g salt.
1 teaspoon/5 ml vanilla
cream the butter & sugar.
beat in the egg and vanilla
in separate bowl, combine/whisk to mix flour, baking powder, salt.
add the liquid mix to the flour 1 cup at a time, stir/mix.
chill the final dough for 3-4 hours.
roll out, cut shapes, do decorations
bake 350'F / 175'C 10-15 minutes.
you'll need to adapt for the addition of golden syrup, if used.
a bit more flour?
the various seasonings/flavors should not affect the dough.
allow to cool.