Preheat the oven to 180°C / fan 160°C and line a baking tray with baking paper. Combine the flour, bicarbonate of soda, cream of tartar and salt in a bowl and make a well in the middle.

Add the buttermilk and stir well to make a soft dough. Transfer the dough to a lightly floured surface and shape gently into a large patty.

Transfer to the prepared baking paper, scoring the top with a sharp knife making a pattern and bake for 30 minutes until risen and golden. Allow to cool before serving.

Serve with butter and jam.