Sir Keir Starmer will not receive a "blank cheque to do whatever he likes" if Labour win the general election, the boss of the Rail, Maritime and Transport (RMT) union has said.Mick Lynch said voters had to "grow up a bit" and recognise Sir Keir as the only realistic alternative to the current Government, the removal of which he described as "my number one priority".

Sir Keir Starmer will not receive a "blank cheque to do whatever he likes" if Labour win the general election, the boss of the Rail, Maritime and Transport (RMT) union has said.Mick Lynch said voters had to "grow up a bit" and recognise Sir Keir as the only realistic alternative to the current Government, the removal of which he described as "my number one priority".