A nerve agent attack on an ex-Russian spy and his daughter in Salisbury has led to a retaliation by the UK government – expelling diplomats and ramping up a war of words. With Putin winning another huge election victory last week, some people are worried that we’re entering a new Cold War. Meanwhile, UK gas supplies have run low thanks to the recent winter freeze. What if Russia were to switch off our gas? Has it done it to other countries? And how would we get by? Ayeisha Thomas-Smith is joined by Dave Powell, who leads on the environment for NEF, and Dustin Benton, policy director for the environmental think tank Green Alliance.