Concorde fleet have been grounded, drained of hydraulic fluid and their airworthiness certificates withdrawn. Jock Lowe, ex-chief Concorde pilot and manager of the fleet estimated in 2004 that it would cost £10–15 million to make G-BOAF airworthy again. BA maintain ownership and have stated that they will not fly again due to a lack of support from Airbus. On 1 December 2003, Bonhams held an auction of British Airways Concorde artefacts, including a nose cone, at Kensington Olympia in London. Proceeds of around £750,000 were raised, with the majority going to charity. G-BOAD is currently on display at the Intrepid Sea,
Braniff International Airways place in Washington on each flight. Braniff became the registered operator of the planes while on U.S. domestic service, and the planes were physically re-numbered with temporary adhesive vinyl. Registration was then returned to Air France or British Airways on the trans-Atlantic leg. Over American soil, the Concorde was limited to Mach 0.95, though crews often flew just above Mach 1; the planes flew at Mach 2 over open water. Concorde service proved a loss leader for Braniff. Braniff charged only a 10 percent premium over standard first-class fare to fly the Concorde – and later removed the surcharge altogether