Lionel Barber and John Authers on euro deal

European leaders have agreed a compact to save the euro with one dissenting voice - the UK. The treaty to enforce changes to the European Union's fiscal rules was vetoed by Britain's prime minister David Cameron. John Authers, senior investment columnist, discusses with FT Editor Lionel Barber, how the treaty could be enforced without all EU members on board, whether it's enough for to appease markets, and where Mr Cameron's stand leaves the UK.