Harold Wilson Labour

When he first became prime minister, many incorrectly predicted that the relationship between the Queen and the Yorkshire-born (though Oxford-educated) Wilson would be cooler, as they came from very different backgrounds. But far from it – their meetings often went on for more than two hours. Unusually, she invited him to stay on for drinks after their first meeting, and reportedly invited him to join the Royals for picnics at Balmoral.