Andrew Mitchell MP (L) is seen with a cup of tea before Former London Mayor and Conservative MP Boris Johnson speaks as he launches his bid to become the next Conservative party leader at St Ermin's Hotel on June 30, 2016 in London, England. Nominations for MP's to declare their intention to run for the Conservative Party Leadership and therefore British Prime Minister will close by noon today. The current Prime Minister and party leader, David Cameron, announced his resignation the day after the UK voted to leave the European Union.