Preheat the oven to 180°C/160℃ fan/350°F/gas mark 4. Thoroughly grease a 10 cup bundt tin.
Set aside 2 Tablespoons of the flour then place the rest of the flour, the cornflour, light brown sugar, baking powder, bicarbonate of soda and salt in a large bowl and whisk to combine.
Add the milk, yogurt, oil, lime zest and vanilla extract and stir with a balloon whisk until no dry lumps remain.
Toss the berries with the reserved 2 Tablespoons flour then tip the lot into the batter and gently fold through being careful not to overmix it. Dollop the batter into the prepared tin and spread it level.
Bake for 50-60 mins until a skewer inserted into the centre (avoiding any fruit) comes out clean and the cake is starting to come away from the sides of the tin.
Leave to cool in the tin for 40 minutes then carefully turn it out onto a wire rack placed over a roasting tin.
Drizzle over the syrup (recipe below) then leave the cake to cool completely.