Royal Air Force started the phase-out of its TriStar fleet with the first example being the one with ZE706 registration number. This aircraft was ferried today from Brize Norton to Cambridge airport.
ZE706 is an ex-Pan Am aircraft which was not converted into a three-point tanker and was used as a passenger transport aircraft, a version designated C2A.
RAF's fleet is now down to 7 aircraft - ZD949 was unexpectedly withdrawn from service earlier after being retrofitted with a glass cockpit which did not go ahead.
RAF's page about the TriStar: here