Preheat the oven to 200oC/400oF/Gas
6. Grease and flour a large baking sheet.
Cut the butter into small pieces.
Combine all the dry ingredients in a bowl.
Add the butter and rub in until the
mixture resembles coarse breadcrumbs. Set aside.
In another bowl, whisk together the
eggs and buttermilk. Set aside 30ml for glazing, then stir the remaining
egg mixture into the dry ingredients until it just holds together. Stir
in the raisins.
Roll out the dough to about 2cm
thickness. Stamp out circles with a biscuit cutter.
Place on the baking sheet and brush
with the glaze.