Stephen Sackur talks to Chris Grayling, the Leader of the House of Commons in the UK and a senior figure in the campaign to leave the European Union. Any hopes that Britain's decision on whether to stay in or leave the EU would be calm, dispassionate and respectful have been well and truly dashed. In the run up to the referendum on 23 June, the the two camps are kicking lumps out of each other - and the fight is at its bloodiest inside the governing conservative party. Will this political war ultimately weaken Britain and Europe?

(Photo: Leader of the House of Commons, Chris Grayling, speaks during a Vote Leave press conference on 31 May 2016. Credit: Carl Court/Getty Images)