Mix together the flour, sugar, salt and
baking powder. Rub in the butter or margarine until the mixture
resembles breadcrumbs. Stir in the milk, water, tomatoes and basil and
mix to a soft dough. Knead for a few seconds on a lightly floured
surface, then roll out to 2.5 cm/1 in thick and cut into rounds with a
biscuit (cookie) cutter. Place the biscuits well apart on a greased
baking (cookie) sheet and bake in a preheated oven at 230°C/425°F/gas
mark 7 for 15 minutes until puffed and golden.