Angela Rayner, the Labour deputy leader, would have people believe she is made in the mould of Barbara Castle, the radical Labour minister, now seen as one of the most significant women politicians of the 20th century. When Rayner was challenged on the BBC’s Today programme that she was more often viewed as a deputy leader like John Prescott, lacking any real power, she dismissed the comparison, replying: ‘I think I’m more of a Barbara Castle.