The amount the UK spends on defence has become a big political talking point in recent days. Later today MPs will call on the Government to promise to continue meeting a guideline for NATO countries to spend at least 2% of GDP on defence each year. Why is the 2% figure so important and instead of fixating on meeting that target should the debate be on making radical changes to defence, as smaller parties like the SNP and the Greens propose? Colonel Bob Stewart is a Conservative MP and former Colonel in the British Army and Darren Hall is a Green Party parliamentary candidate for Bristol West and a former RAF engineering officer.
Listen at: http://www.bbc.co.uk/programmes/b054t3s0 (at 1h 19m)