G-BOAA was never upgraded to the new airworthiness standard after the tragic Air France accident. It was scheduled to be, however the events of September 11th and the downturn in Transatlantic business ensured that it never took place.
It has not been certificated as airworthy since it was grounded and the necessary work to bring it to flying standard would be prohibitive, even to such a blatant money wasting organisation such as the Scottish Executive