As peace talks begin in Norway between the Colombian government and Farc guerrillas, any brighter future for the country’s people requires new responsibility from the City of London and the British government. The UK represents one of the biggest investors in Colombia and last year president Juan Manuel Santos made a special visit to drum up trade in Britain. But UK-based multinational companies stand accused of fuelling a conflict which has already lasted four decades. [Among London-listed companies involved in Colombia are Anglo American, AngloGold Ashanti, BHP Billiton, Glencore, Rio Tinto and Xstrata.]