Previously unseen drawings by Moomins author Tove Jansson to go on show in London

The Moomin books about lovable trolls with hippopotamus snouts who live in harmony with nature are a global publishing phenomenon, having sold up to 30m copies since the Finnish artist and writer Tove Jansson wrote and illustrated them between 1945 and 1977.

Now previously unseen drawings of her eccentric characters will be among more than 100 exhibits in a major exhibition that is being staged in London 25 years after her death.