The UK spends more than £50bn a year - 2.2% of Gross Domestic Product (GDP) - on defence, but government documents shared with Sky News show the country has no preparations for a nuclear war.   In January, Defence Secretary Grant Shapps warned the country is approaching a pre-war era and that in five years' time the UK could be looking at conflicts with Russia, China, Iran and North Korea.   So, is the UK ready?   On the Sky News Daily, Tom Cheshire is joined by our security and defence editor Deborah Haynes, who has seen documents outlining the UK's preparedness for nuclear war, and asks former soldier and now defence policy expert, Robert Clarke, what the military will need to do to prepare for war.  Producer: Soila Apparicio  Editor: Philly Beaumont