A giant 50ft rubber duck is being prepared for a sail down the River Thames to celebrate the launch of a Facebook FUNdation, a bursary granting funds and rewards for daft ideas to encourage the British to have more fun.
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The eagle-eyed resident spotted the mistake on signs just feet apart in south London.
The victim was attacked after bumping into a man at the ticket barrier at Putney Station.
The victim, who is his 40s, was found near the edge of palace grounds.