Golden Syrup - Untested

https://www.daringgourmet.com/how-to-make-golden-syrup/#recipe

https://sweetmouthjoy.com/golden-syrup/#recipe

https://www.taste.com.au/recipes/homemade-golden-syrup-recipe/oj78k97k

The first link is for the basic recipe, the second for the brown sugar addition, the third for the whole half lemon method.