One of the routes on which Civilian Britannias had a long career was the Courier Service to Woomera:
BUA - Who lost the contract to:
Cunard Eagle which became
British Eagle and after their demise
Monarch took it over.
I only remember ever seeing one picture of an Aircraft at the Woomera end of the service (Eagle, but which entity cannot remember) does anyone have any Pictures of a Brit on the ramp at Woomera?