Sift the flour into a mixing bowl and add the salt, make a well in the centre and add both eggs. Beating gently, mix the eggs and slowly start to incorporate the flour and gradually drizzle the milk into the mixture until it forms a medium thick batter. This stage is best done at least an hour before cooking so that the mixture has time to mature.
Turn on the oven to a high heat, about 200 Celsius and put a roasting tin or oven proof dish with the oil into the oven to pre-heat. Brown your sausages in a frying pan. Once the oil in the baking tray is hot (not quite smoking, but hot oil makes a good batter) pour the batter mixture into the tray and add the sausages. Pop into the oven for 15 to 20 minutes until the batter is golden brown and risen.
Serve immediately with vegetables and a rich onion gravy.