Keira Knightley, Jon Snow and Tamsin Greig take time out for the East Africa Crisis Appeal
Tamsin Greig and Jon Snow have filmed their own take on a dramatic pause, while Keira Knightley called on the British public not to delay in offering their support.
Earlier this week Golden-Globe winning actor Bill Nighy led the campaign with a video urging people to act fast, which confronted commuters on their journeys and delayed the start of videos on YouTube.
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