Preheat the oven to 425°F (215°C). Line a baking tray with parchment paper and set aside.

Mix together the flours, baking soda and salt in a large bowl. Add the butter and rub it into the flour mixture with your fingertips until it resembles course bread crumbs.

In a separate jug, whisk the egg and buttermilk together.

Make a well in the center of the dry ingredients and pour in the liquid.

Using an open hand, bring the flour and liquid together to a loose dough. The dough should be quite soft and a bit sticky. If your dough is a little dry then add a splash more buttermilk.

Turn the dough onto a floured work surface and gently bring the dough together in a ball. Flatten it into an 8-inch round, about 1 ½-inches (4cm) thick.

Place on the baking sheet and score the bread by blessing it with a deep cross on top (see video). Poke a hole in the 4 corners of the bread to release the fairies and stop them from cursing your beautiful bread.

Glaze the bread with the leftover bit of buttermilk in your jug and scatter the rolled oats on top.

Bake for 15 minutes, then turn down the oven to 400°F (200°C) and bake for 30 minutes more. When done, the loaf will sound slightly hollow when tapped on the bottom. Remove from the baking sheet and place on a wire rack to cool.

Once cooled, slice the bread and enjoy with butter. Store leftovers covered at room temperature for up to 3 days.