David Cameron and Vladimir Putin have begun bilateral talks in Paris, with the Prime Minister already threatening the Russian President with further sanctions if his government does not do more to defuse the crisis in Ukraine.
Mr Cameron is expected to urge Mr Putin to recognise the legitimacy of the new Ukrainian president, Petro Poroshenko, as well as withdrawing any support for pro-Russian separatists in eastern Ukraine.
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A former Royal Marine who was recently engaged has been killed in a climbing accident in the French Alps.