Tony Benn, one of the great figures of the British left-wing has died at home aged 88.
He recorded the following message for Channel 4 to broadcast upon news of his death.
One of the best quotes is his advice on when one meets a powerful person, ask them five questions.
What power have you got?
Where did you get it from?
In whose interests do you exercise it?
To whom are you accountable?
And how can we get rid of you?
If you cannot get rid of the people who govern you, you do not live in a democratic system.