Coldplay singer Chris Martin has been accused of attacking a photographer after leaving a London restaurant with pregnant wife Gwyneth Paltrow. A Metropolitan Police spokesman confirmed it was investigating the incident, alleged to have taken place on Wednesday night in Knightsbridge. "An allegation was made about an attack in the area," the spokesman said. A Coldplay spokesman said photographer Alessandro Copetti had been running after Paltrow's taxi and tripped. Mr Copetti told the Sun newspaper he had been taking pictures of the singer and his wife outside the San Lorenzo restaurant when Martin kicked him from behind. But the Coldplay...