US singer Prince delighted fans by performing at a surprise gig in Camden last night.
He took to the stage of the Electric Ballroom in Camden, north London, late last night backed by his new 3RDEYEGIRL band.
Rumours of the gig had begun circulating on Twitter, with some fans fortunate enough to get tickets.
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The plaque at number 16 Cowley Street in Westminster marks the brown brick Georgian townhouse where Sir John lived for 31 years.
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Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.