Preheat the oven to 180°C / 160°C fan / gas mark 4 and line a 2lb loaf tin with baking paper.
In a large bowl, mix together the plain flour, light brown sugar, ground ginger, cinnamon, mixed spice, bicarbonate of soda, and salt.
In a separate bowl or jug, whisk together the golden syrup, vegetable oil, and dairy-free milk.
Pour the wet ingredients into the dry ingredients and mix until smooth.
Transfer the mixture to the prepared loaf tin and level the top.
Bake for 40–45 minutes, or until a skewer inserted into the centre comes out clean.
Leave the loaf to cool in the tin for 10 minutes, then transfer to a wire rack to cool completely before slicing.