I've tried those Tesco's chipolatas - they're very good! As you say, they are more like normal sized sausage than a chipolata. Tesco's also do a couple of other pretty low carb sausages. There are one's called something like Toulouse sausages which are French style and seem to be just about all meat, and some Hungarian paprika ones. They are on the shelf with the Finest sausages range. They don't taste like traditional British bangers, and look a bit strange but they're very good! They remind me more of a kofta than sausages, or those sausagey things you get in Indian restaurants.