By Tim Hanlon Brits are set toface conscription if the UK went to war and here is how it would work as military tensions continue to rise around the world. The head of the British Army is to warn ministers today that they need to “mobilise the nation” if war breaks out with Russia. General Sir Patrick Sanders is addressing the International Armoured Vehicles expo in Twickenham and he will be expressing his concerns over the current situation \- and the need for a change in the public’s mindset. It comes just days after a top NATO chief said civilians must be ready for an all-out war with Russi…