Keira Knightley on the importance of Alan Turing's story

Keira Knightley and Benedict Cumberbatch were some of the stars out for the UK premiere of The Imitation Game last night.

It focuses on a team of code breakers at Bletchley Park during World War 2, with Cumberbatch playing Alan Turing who is often considered the father of the modern computer.

But his story also has a more tragic side and Keira told us it’s important we all find out what Turing did for us.