Golden Syrup, like Lyle's Golden Syrup, is a lighter, sweeter syrup with a subtle caramel flavor, perfect for flapjacks, biscuits, and pouring over desserts. Treacle, often a darker, richer syrup with a more complex, slightly bitter molasses taste, is essential for classic recipes like Sticky Toffee Pudding, Parkin cake, and dark fruit cakes. Both are staples in British baking for adding moisture, richness, and a unique flavor profile that's hard to replicate!