Mr Boris Johnson, an ardent supporter of Britain's withdrawal from the European Union, took over as Prime Minister from Mrs Theresa May yesterday and was preparing to appoint a new Cabinet, a day after his easy victory in a Conservative Party leadership vote.
Mr Johnson met Queen Elizabeth II at Buckingham Palace shortly after Mrs May left No. 10 Downing Street for the final time to formally offer her resignation to the monarch.
Later, outside his new residence, Mr Johnson vowed to implement the result of the 2016 Brexit referendum and lead Britain out of the European Union on Oct 31 with "no ifs or buts". But his strategy sets Britain up for a showdown with the EU and thrusts it towards a potential constitutional crisis, or an election, at home.