Add the self-raising flour to a mixing bowl with the salt then add all the wet ingredients and whisk till you get a nice smooth batter. Pre heat the oven at 200c to 220c. Add the oil to your Yorkie tins and place in the oven to heat the oil up for 20 minutes. Once the oil is HOT add the yorkie batter to the tins and place in the oven for 25 to 30 minutes. DO NOT OPEN the oven for at least 25 minutes otherwise your Yorkie will drop.