David Cameron said Argentinian President Cristina Kirchner should respect the outcome of the referendum on the Falkland Islands set to be held later this year.
The Prime Minister said if Falkland Islanders wanted to remain part of Britain, they would have his "100 per cent backing".
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Temperatures have already plunged to -12C in some parts of the UK this winter - but Thursday could be the coldest day yet.
The 86-year-old has been removed from his position as CEO of Formula One as US giant Liberty Media completed its £6 billion takeover.
Donald Trump's press secretary has said the Trump administration's "intention is never to lie to you", amid a row about inauguration crowds.