Method
To help make the batter, sift the flour right into a large bowl. Add some pepper and salt.
Create a well within the center from the flour and crack within the eggs. Utilizing a wooden spoon, progressively beat the eggs in to the flour then gradually beat within the milk before the batter may be the consistency of double cream.
Strain and push any remaining protuberances via a sieve. Stir within the thyme. Cover and then leave to face for half an hour, or ideally 3-4 hrs.
Preheat the oven to 200C/400F/Gas 6.
Heat a sizable non-stick pan and prepare the sausages on the medium heat until golden-brown throughout. (If you don't possess a non-stick pan give a little oil.) Switch off heat and brush the sausages using the mustard. Put aside.
Put the dripping or white-colored vegetable fat into an ovenproof dish as well as heat within the oven for 5 minutes or before the dripping is hot and hazy.
Add some sausages towards the hot dish and pour within the batter. Immediately return the dish towards the oven and prepare for 35-40 minutes until well-risen and golden-brown.
Serve seasoned with pepper along with a large knob of butter.