A disputed case A perennial thorn in, Navalny has been arrested and detained several times but had until now avoided lengthy sentences.
Health Secretary Sajid Javid top centre , Housing Secretary Michael Gove bottom centre , Commons leader Jacob Rees-Mogg bottom right and Environment Secretary George Eustice top right were among those seen departing Downing Street after gathering for crunch talks late into the night.
Turkish President Recep Tayyip Erdogan recently made provocative declarations about not recognizing Crimea as Russian territory and returning the peninsula to Ukraine.
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A Moscow court sent Russian opposition leader to prison for more than two and a half years on Tuesday, prompting protests across the country.
The photos, which have also been carefully restored, feature in The Great War Illustrated 1915.