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".
More top news
Cuts to local services will continue across many towns and cities in the UK, despite council tax bills rising by up to 5% this year.
Monday will be windy and mild, with some sunshine across central and southern parts once the morning mist and murk clears.
Malaysia has recalled its ambassador to North Korea as tensions over the investigation into the death of Kim Jong-nam boiled over.