Preheat oven to 200° or 180° fan forced Line a baking tray with baking paper Place the flours, baking powder, sugar and salt in a large bowk and mix until combined.
Rub the butter into the flour until the mixture resembles fine breadcrumbs
Add the yoghurt and mix well. Gently fold through the blueberries being careful not to burst them.
Turn the dough onto a lightly floured surface and with floured hands gently form into a ball.
Using a lightly floured rolling pin, roll the dough out to a 2.5cm thick square. Cut into 9 even pieces.
Place scones on a baking tray and bake for 12-15 minutes or until golden
To serve, split the scones in half and serve with butter and jam.