UK Prime Minister Boris Johnson (L) pulls a pint with newly elected Conservative party MP for Sedgefield, Paul Howell at Sedgefield Cricket Club in County Durham on December 14, 2019 (Photo by Lindsey Parnaby - WPA Pool/Getty Images)

  • UK Prime Minister Boris Johnson broke his self-imposed alcohol ban with a glass of wine after the scale of his election victory became clear on Thursday night.
  • He then celebrated his win his partner Carrie Symonds at a Christmas party on Friday attended by celebrities including Mick Jagger and Princess Beatrice.
  • Johnson also settled his rivalry with David Cameron, after the former prime minister congratulated him on an 'extraordinary result' and hugged him.
  • For more stories visit the Business Insider South Africa homepage.

Boris Johnson broke his self-imposed alcohol ban, partied with celebrities including Mick Jagger and Princess Beatrice, and shared a "man hug" with former prime minister David Cameron in the wake of his crushing election victory which saw him secure an eighty-strong majority.

The UK prime minister, who had vowed not to drink alcohol until he had taken Britain out of the EU, abandoned his pledge after the scale of his victory became clear on Thursday evening, and drank a glass of wine for the first time in months, the Mail on Sunday reported.

While polls throughout the election campaign had indicated a Conservative lead over Labour, few within the party predicted that it would translate to such a commanding majority, the biggest since Margaret Thatcher was leader.

It prompted a night of celebrations at Conservative Party headquarters, where staffers celebrated until 5 am, and where Boris Johnson paid a visit to thank them for their work on the campaign.

On Friday night, the prime minister, having secured his majority and delivered a triumphant speech on the steps of Downing Street, celebrated his victory with his partner Carrie Symonds at a party attended by a string of A-list celebrities.

They included Mick Jagger, Princess Beatrice, Bob Geldof, Jemima Goldsmith, and Johnson's sister Rachel.

The Christmas party, held by Russian tycoon and Evening Standard newspaper owner Evgeny Lebedev, was also attended by David Cameron.

The former prime minister and Johnson share an intense rivalry that spans decades, but Cameron reportedly congratulated Johnson on an "extraordinary result" before the pair shared a "man hug" witnessed by former Chancellor George Osborne, the Mail reported.

Johnson's focus will now turn to preparations for a new administration. He will conduct a mini-reshuffle on Monday that will see outgoing Culture Secretary Nicky Morgan replaced with a new cabinet minister.

On Thursday, he will use the Queen's Speech to announce a new NHS bill and outline plans to introduce the Brexit bill to the new parliament.

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