Begin by weighing out all your ingredients
Chop your butter and vegetable fat into a 1cm dice
Stir all the dry ingredients together
Toss the butter and vegetable fat in the flour, then cut into the flour using a pastry cutter or the prongs of a fork until there are chunks of butter left in the dough
Add water, a tablespoon at a time to the dough and stir. Continue to do this until the dough clumps together - around 5 -6 tablespoons
Press a clump of dough together between your fingers. If it stays toegther, the dough is ready
Bring the dough together into a ball and flatten it to a disc. Cover with cling film and chill for 2 hours before rolling out and lining your pie dish.