Mix the flour, eggs and milk with a pinch of salt and pepper and set aside for 30 minutes. Preheat the oven to 220°C/200°C fan/gas mark 7.
Untwist the links between each sausage, keeping them connected. Coil the sausages tightly to make a spiral and secure with wooden skewers. Put in an ovenproof skillet with the oil, then brown in the oven for 12-15 minutes.
Remove the pan from the oven and carefully take out the sausages. Remove the wooden skewers and discard.
Pour the batter into the pan, then put the sausage spiral on top and scatter with the herbs. Return to the oven and cook for 25-30 minutes, without opening the oven.