SAUSAGE FEST!
The Sausage King is in the St Lawrence market. Although it's been there a few years, it was just very recently taken over by OLLIFFE butchers (look for the new swanky sign!) and now has some gluten and filler-free handmade sausages, as well as traditionally raised pork, beef and poultry. They also have sandwiches, salads and other prepared foods.
They don't have as good of a selection as the sausage place in the south market, but Sausage King is in the north market so open daily rather than only Saturdays, so it's your new best bet for sausages Sunday-Friday.