Grey seals are Britain's largest mammal, but remain a mystery. Mary Colwell meets Sue Sayer on a windy cliff in Cornwall to view the animals Sue loves so much. Show more
Discover 11,128,835 listings and 279,899 playable programmes from the BBC
Grey seals are Britain's largest mammal, but remain a mystery. Mary Colwell meets Sue Sayer on a windy cliff in Cornwall to view the animals Sue loves so much. Show more