Prime minister facing disastrous elections in Scotland, Wales and England next year as his party trails Nigel Farage’s Reform UK in the polls Sign up for the View from Westminster email for expert analysis straight to your inbox Get our free View from Westminster email Get our free View from Westminster email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice The boss of the UK's largest union has said she cannot guarantee