Virgin founder and deputy prime minister argue that ‘war on drugs’ has failed and urge UK to follow Portuguese exampleA drug dealer poses with cannabis products as he waits for customers in downtown Lisbon. Photograph: Francisco Seco/APPatrick Wintour, political editorTuesday 3 March 2015 17.00 EST Last modified on Tuesday 3 March 2015 19.52 ESTShare on FacebookShare on TwitterShare via EmailShare on LinkedInShare on Google+Share on WhatsAppSir Richard Branson and Nick Clegg are urging the UK to begin decriminalising the use and possession of almost all drugs, following the example of Portugal.The Virgin founder and deputy prime minister are to address a conference on fighting drug addiction on Wednesday,...