Preheat the oven to 180C.
Beat the butter and sugar together until light and fluffy.
Beat in the eggs one by one until combined. Wipe down the sides of the bowl between each addition.
Add the flour, orange zest and Pimms, and stir in until totally combined.
Pour the batter into a loaf tin, lined with baking paper.
Bake for 35 - 45 until a skewer comes out clean.
Whilst the cake is still hot and in the tin, prick it all over with a skewer (or thin knife).
Mix the sugar, Pimms and orange juice in a small bowl and drizzle over the cake. It may take a while to sink into the cake, so you may need to add it slowly.
Allow to cool in the tin, then turn out, and top with the fruit just before serving.