Counter-terrorism police officers are leading the investigation into the cause of a fire which has led to the closure of Heathrow Airport.A spokesperson for the Metropolitan Police said there is "currently no indication of foul play" but "we retain an open mind at this time".

Counter-terrorism police officers are leading the investigation into the cause of a fire which has led to the closure of Heathrow Airport.A spokesperson for the Metropolitan Police said there is "currently no indication of foul play" but "we retain an open mind at this time".