Michael Bradley was an off-duty pilot who stepped in to help after the Alicante-bound plane had no pilot available.
The woman was allegedly drinking red wine from a plastic bottle during the flight.
The 23-year-old faces five years in prison over the hoax bomb threat.
Kate McWilliams, 26, flies to more than 100 destinations from London Gatwick.
British Airways denies that any changes have been made to its in-flight catering.
The airline says authorities are not allowing British aircraft to land at the airport.