Concorde G-BOAB, nicknamed Alpha Bravo, was never modified and returned to service with the rest of British Airways' fleet, and has remained at London Heathrow Airport since its final flight, a ferry flight from JFK in 2000.[252] Although the aircraft was effectively retired, G-BOAB was used as a test aircraft for the Project Rocket interiors that were in the process of being added to the rest of BA's fleet.[253] G-BOAB has been towed around Heathrow on various occasions; it currently occupies a space on the airport's apron and is regularly visible to aircraft moving around the airport.[254]