Lauren Martell claims to have witnessed an alleged incident involving Rolf Harris in the bathroom of a London music studio in the early 1990s.
The woman contacted the Metropolitan Police in November when she first heard of the investigation into Jimmy Savile.
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A man has been killed by thieves who ran him over in his own car after he confronted them outside his home, police said.
One London Marathon runner who helped an exhausted competitor said it was "worth it" to help his rival.
The Irish Coast Guard helicopter went down into the Atlantic last month.