1-Add the butter, golden syrup, brown sugar: Add the butter, golden syrup, brown sugar and cocoa powder to a large saucepan and place on a low heat. Heat gently until melted, then remove from the heat.
2-Crush the biscuits – I do this: Crush the biscuits – I do this by placing them in a sealed sandwich bag and bashing them with a rolling pin! You want them mostly as crumbs, but with some bigger chunks.
3-Add the crushed biscuits, raisins and cherry: Add the crushed biscuits, raisins and cherry halves to the saucepan and mix together well. Pour into the lined baking tin and smooth down into one layer.
4-Melt the dark chocolate milk chocolate (in: Melt the dark chocolate milk chocolate (in separate bowls) in the microwave in 10-20 second intervals. Pour the chocolate over the tiffin, marbling the two together to cover the entire tiffin.
5-Place in the fridge for at least: Place in the fridge for at least 2-3 hours or until set (ideally overnight) before cutting into 16 squares or 8 triangles/rectangles.