Indeed, referendums cannot be binding in the UK, because that would be taking sovereignty away from parliament. There have only ever been 3 national referendum

Indeed, referendums cannot be binding in the UK, because that would be taking sovereignty away from parliament. There have only ever been 3 national referendums in Britain. One to join the EU, one to leave the EU, and one over Alternative Vote. They used to be considered unconstitutional, a tool for demagogues. I would be happy to ditch them forever.