Watch another FT Feature:    • Frozen Dreams: Russia's Arctic obsess...  . Read 'How David Cameron lost his battle for Britain' - http://on.ft.com/2i98o1I. Subscribe to FT.com here: http://on.ft.com/2eZZoL. Inside Brexit: How Britain lost the European plot. The FT talks to politicians and strategists to find the real story behind the EU referendum.