AirTanker supplies Voyager and everything needed to support aircraft operation to the RAF to deliver a new strategic and tactical air transport and air-to-air refuelling capability to UK Armed Forces around the globe.
Although the RAF retains full operational control of aircraft, tasking and operational planning is delivered by AirTanker in support of RAF operations through its team of RAF embedded and civilian personnel.
This covers a full spectrum of responsibilities from fleet planning to control, clearance and the planning of individual sorties, directed from our state-of-the art Flight Operations control centre at the AirTanker Hub, RAF Brize Norton.
Probably not flight crew though.
http://www.airtanker.co.uk/about/what-we-do
However:-
The RAF Voyager service is underpinned by a multitude of roles performed by AirTanker’s civilian team.
This includes not only engineering, flight crew and flight operations teams but compliance, commercial, finance and other administrative support functions.