Russia has told Britain a total of more than 50 of its diplomats will have to leave, amid a deepening row over the poisoning of a former Russian spy and his daughter in the UK. Moscow initially expelled 23 British diplomats after 23 Russian diplomats were ordered out by London. But now the Russians are insisting that even more UK diplomats should leave. It says the UK and Russian diplomatic missions should be the same size in each country. In practice that would mean at least another 27 UK officials being sent home, the BBC's Paul Adams reports from Moscow. But it is also possible that some of the additional ... (full story)