3/6. A huge volcanic eruption in Iceland in 1783 spewed out poisonous gases that enveloped Europe, killing thousands of Britons. The ensuing winter was one of the worst ever and cost countless more lives. This environmental disaster is well known in Iceland but its impact on Britain has - until now - been a mystery. With Thorsteinn Gunnarsson as Jon Steingrimsson , who recorded the event. Michael Praed narrates.
Producers Monika Kupper/Dan Walker; Editor John Farren