One of the few near certainties in a fluid political scene – with a Rubik’s Cube’s worth of outcomes possible after next May’s general election – is that in a year’s time we will be in the midst of a strategic defence and security review (SDSR). By my calculation, it will be the twelfth such review since the end of the Second World War. It will be shaped in straitened times for public expenditure against a backdrop of global political uncertainties and threats, some of them on our shores in the form of jihadi-related terrorism.The 2015 SDSR will be accompanied by a national security strategy (NSS) covering the wider canvas of the UK’s place in the world. It will include what we can aspire to do alone or with our allies, our remaining instruments o