Heat the butter, syrup and sugar together in a small pan until melted, stirring throughout.
In a bowl, mix together the bicarbonate, ginger, cinnamon and flour. Pour in the buttery syrup mixture and stir to combine, use your hands to bring form a dough. The dough will be very soft but it will firm up in the fridge.
Place the dough on a sheet of nonstick paper, shape into a circle, and lay another sheet of parchment on top of it. Roll the dough out to a thickness just slightly thicker than your finished cookies. Transfer to a flat sheet or plate keeping it flat, and chill in the fridge for 1 hour.
Heat the oven to 190C/170C fan/gas 5 and line a large baking sheet with more baking parchment. Remove the dough from the fridge and cut out shapes using a cookie cutter.
Place the shapes, spread apart, on the lined baking sheet, and bake for 10-12 mins. Depending on the size of the biscuits, they might need a few minutes more or less cooking in the oven. Keep a close eye as it is easy to overcook them. Leave to cool on the baking sheet and enjoy your treat!