During an appearance on BBC Radio 5 Live yesterday, host Emma Barnett said it was ‘quite striking’ that Britain’s first female Prime Minister – the working class daughter of a Grantham grocer – wasn’t in there.

Ms Barnett said she thought the former Tory leader, who died in 2013 aged 87, fitted the description of a ‘gutsy women, even if you didn’t like her.’

Hillary, who had wanted to be America’s first female political leader 27 years after Mrs Thatcher swept to power, responded: ‘She doesn’t fit the other part of the definition in our opinion, which really is knocking down other barriers for others and trying to make a positive difference’. She also said she had a ‘conflicted record’.