The requirement to be a British national blocked the appointment of non-British Commissioners in the past. In August 2011, Prime Minister David Cameron wanted former Los Angeles Police Department Chief Bill Bratton to become the new Met Police Commissioner, but this was blocked by the Home Office pointing out that the Commissioner has to be British. This changed with an amendment to the Police Reform and Social Responsibility Act 2011 whereby a person who is or has been "a police officer in an approved overseas police force, of at least the approved rank" could be appointed, in addition to "a constable in any part of the United Kingdom".