Sift the flour into a bowl
Rub the butter or margarine into the flour, until it looks like breadcrumbs
Add 2 tablespoons of water and stir
Try to bring the pastry together with your fingers, adding more water if necessary, but just a drop at a time
Only work the dough enough to bring it all together and then stop
Place the dough in a polythene bag put it in the fridge for at least 30 minutes to 'rest'.
Roll out the pastry
Grease a cake tin or flan dish
Gently trim of off any excess
If you have time - bake blind for 10-25 minutes (see video above). Cut a round of greaseproof paper to size and fill with baking beans or dried beans. Place in a preheated oven for 10-15 minutes. Carefully remove sheet and beans.