The first one taken over from BA by the RAF (we were told it had very few airframe hours logged being ex 'BOAC' fleet rather than ex 'BEA' fleet) came into Farnborough from Heathrow, still in BA colours and night stopped. Next day the crew enjoyed themselves doing low passes along the runway to enable the Farnborough 'boffins' to map its IR signature, then it departed to Brize.