I understand that Heathrow Airport has issued a Directors Notice on behalf of HM immigration that states that Engineers and Loadmasters are not considered part of the aircraft crew under the Air Navigation Order. As a result of this any Engineer or Load Master must either be a UK citizen or be have the appropriate work visa before they start to work in the UK. The DN states that the airside area is part of the UK and thus a flying spanner or Loadmaster cannot arrive and depart on the same aircraft to handle the turnaround. .