Pour dry ingredients straight into a baking dish (I don't do this though, I grease a dish thing and mix in a bowl). Around 23 x 23cm (9x9in) is a perfect size. Combine the ingredients with a spoon until mixed thoroughly.
Make three wells in the dry mixture - one large, and two smaller. Pour the oil into the large well, the vinegar in one of the smaller ones, and the vanilla in the other.
Pour the raisin water over the mixture. Mix all ingredients together, so you don't see any flour. (then put in the cake dish).
Bake at 180 C / 350 F for half an hour.
If you want to ice the cake, I make up an icing of icing sugar and a little cocoa then mix with hot water.
Enjoy. ^__^