Voting is set to close later on Monday in the Conservative leadership contest.
Party members have until 5 pm UK time to vote for either Jeremy Hunt or Boris Johnson as their next Tory leader.
Johnson, who is the former mayor of London and the ex-Foreign Secretary, is widely considered to be the favourite in the race.
The UK's next prime minister will be announced on Tuesday, and he will take office a day later, succeeding Theresa May.
Trump not satisfied with Iran's latest proposal, will not 'leave war early'
US President Donald Trump said on Friday he was not satisfied with the latest Iranian proposal for talks on the war, while Iran's foreign minister said Tehran was ready for diplomacy if the United States changes its approach.
Iran sends proposal for negotiations with US to mediator Pakistan
Tehran has submitted its latest proposal for negotiations with the United States, Iranian state media and a Pakistani official said on Friday, a move that could offer hope for breaking a deadlock in efforts to end the Iran war.
Iran threatens painful response if US renews attacks
Iran said on Thursday it would respond with "long and painful strikes" on US positions if Washington renewed attacks and restated its claim to the Strait of Hormuz, complicating US plans for a coalition to reopen the waterway.
US Navy acting 'like pirates' to carry out naval blockade of Iranian ports, says Trump
President Donald Trump said on Friday the US Navy was acting "like pirates" in carrying out Washington's naval blockade of Iranian ports during the US and Israel's war against Iran.
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