
Concorde 204 was initially used by the manufacturers, BAC, to complete Certificate of airworthiness items, such as air conditioning system checks and auto landing trials. After the completion of these tests, 204 was used on route proving duties around the world. Alpha Charlie was mainly based in Bahrain but also flew some routes out of Singapore. The aircraft was returned to BAC in 1976 (after completing 141 flights) to be refurbished for airliner service. G-BOAC was officially delivered to BA on the 13th Feb 1976.
As G-BOAC is the oldest Concorde in the BA fleet, although not the oldest officially owned by BA (that honour falls to G-BOAA), it is also the heaviest; mainly due to the fact that it was one of the first built and the other aircraft all benefited from the design being tweaked and the weight being reduced as production went along.
British Airways consider Alpha Charlie as the flagship of their Flagship fleet as it carries the letters 'BOAC' which were also the initials of the British Overseas Airways Corporation – the forerunner, along with British European Airlines, to British Airways.