Whisk the dry ingredients well and then pulse with the butter in a food processor until blended well.
Transfer to bowl, mix in the raisins and lemon peel, then add the milk and yoghurt slowly, just until the mixture comes together.
Rest for 10-15 minutes.
Roll lightly to ¾ inch thick and cut with a 2” cutter (straight down).
Place on a greased baking tray and brush with the beaten egg
Bake for 10-12 minutes at 190°C / 375°F until golden brown.
Place on a wire rack to cool.
Notes
Scones are traditionally served with clotted cream and strawberry jam, however, golden syrup and clotted cream, a combination known as "thunder and lightning" is delicious.A long-standing debate is what to spread on your scone first.......In Cornwall, traditionally, the jam is put on first and then the clotted cream, while in Devon, the cream is put on first. Which do you prefer?