Thank you for a delicious and moist recipe that made my house smell wonderful while it was baking. For those of you asking questions about golden syrup: Golden syrup, like molasses, is a product of the process of refining sugar. It is simply sugar cane juice that has been boiled down. It has the consistency of corn syrup, but a golden color and a taste different from either light or dark corn syrup, and also substantially different from its cousin, molasses.
This recipe is unlikely to taste as good without the use of honest-to-goodness golden syrup, but if you must, you can try substituting it with 2 parts light corn syrup and 1 part molasses or equal parts of honey and light corn syrup. You can purchase Lyles Golden Syrup on Amazon.com if you can't find it in local stores. Hope this helps.