For those in USA, Golden Syrup can be brought at Walmart.
https://www.walmart.com/ip/Lyle-s-Golden-Syrup-11-oz-Pack-of-12/17182633
6 oz SR Flour
6 oz butter
3 Large Eggs
1 tsp baking powder
6 oz sugar ( light brown is nice )
Soften ( cream) the butter with the sugar, mix the flour and baking powder then put all into a bowl and mix
Golden Syrup or Marmalade into bottom of cooking bowl, add the mixture and cover the top with buttered baking /grease proof paper and a foil lid held on with string ( or I use an elastic band ).
steam 2 hours.
Another nice option is to add a couple of tbl spoons of golden syrup to the sponge mix.
This makes a 1lb / 1kg bowl.