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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Barack Obama has delighted the crowds at St Andrew's golf course as he teed off his visit to Scotland with a game of golf.
Britain's most senior counter-terrorism officer said "immense" progress had been made in the investigation into the Manchester bombing.
Scotland sees the best of today's weather but temperatures are a good 10C above average for the time of year across much of the UK.