Sir Keir Starmer faces a showdown with over 100 of his backbenchers if he U-turns on a promise to cap ground rent for leaseholders, a senior Labour MP has warned. Barry Gardiner told Sky News that it will be a "betrayal" of Labour's manifesto "and of natural justice" if the government rows back on one of its flagship housing promises. Politics Live: China's controversial 'super' embassy in London approved It comes amid cabinet divisions over leasehold reform, which has sparked a major