Preheat the oven to 220C/200C Fan/Gas 7.
Combine the flour, baking powder, sugar and butter in a large bowl. Rub in the butter with your fingertips until the mixture resembles fine breadcrumbs.
Crack the egg into a jug and add milk until both give you 150ml. Add to the breadcrumbs and mix until you have a sticky dough.
Knead lightly on a floured surface, then roll out until about 2cm thick. Cut into circles (using a 5cm cutter), place on baking trays and brush the tops with a little leftover milk.
Bake for 12-15 minutes or until pale-golden and well risen. Leave to cool for a bit but enjoy as fresh as possible. Split the scones and top with strawberry jam and clotted cream to serve.