Cornwall with Simon Reeve episode 2: In the second of two programmes, Simon investigates the environmental challenges facing Cornwall and the rest of the country, and on the way encounters some of its iconic wildlife, including Britain’s largest predator, the huge grey seal. More than a third of the global population is found in UK waters, where they are threatened by ocean pollution. Diving into coastal waters, Simon accompanies the volunteers who clean up the discarded fishing nets that can entangle and drown the seals.