After 10-15 mins take the sausages out of the oven, shut the oven door to keep the heat in and quickly pour the batter evenly over the sausages then put straight back in the oven for another 35-45 mins. (Do not open the oven door during this time) When done the Yorkshire will be risen and deep golden all over. (if the pudding starts to brown too quickly during cooking, turn down to 150 degs and leave 5 mins longer)