Britain vs Russia: A New Cold War? Relations with Russia are at their worst for decades after the Putin regime was blamed for the chemical attack in Salisbury that poisoned a former Russian double agent, his daughter and a policeman who tried to help them. It was a shocking event that has led to tit-for-tat diplomatic expulsions and threats of further action. But how bad could things get - and what can Britain really do? Adam Shaw investigates.
