Sun, 04/30/2023 - 05:15 Tech Insider Travel British Airways' mock first-class cabin, and Insider's Pete Syme.Pete Syme/Insider Tags Transportation, Careers, Travel, Features, Weekend BI UK Feature, Aviation, British Airways, First Class, Cabin Crew, Flight Attendants, London, Heathrow Airport Source I spent a day learning how to be a flight attendant for British Airways' first-…