Operation Grange is an investigative review by London's Metropolitan Police Service into the circumstances of the disappearance of Madeleine McCann. The operation, conducted by the Homicide & Serious Crime Command, is led by Detective Chief Inspector Andrew Redwood and he is supported by a further twenty-eight detectives and seven other staff. The review is overseen by the Gold Group management structure. The cost of the operation, which has been funded out of a special fund, has amounted to several million pounds. The review was launched in May 2011 following a request to Scotland Yard from Home Secretary Theresa May, with the support of the Prime Minister David Cameron. The issue of whether this request was the result of "threats" or "persuasion" from Rebekah Brooks was one of the issues raised at the Leveson Inquiry.