Just been to Tesco in search of sausages, best I could find was Tesco finest chipolatas. Couldn't find any that were 0.5g carb, but it's a only a small difference anyway. They are 97% pork and 0.7g carbs for 2 sausages. I have added them to MFP called 'tesco pork chipolatas (97% pork)' just in case anyone else wants to give them a bash and uses MFP.