BA's oldest aircraft that was originally delivered to the airline is no less than Airbus A.320-111 G-BUSB (No. 6 off the line)! The aircraft was originally rolled out in BCal colours, but hastily repainted after the BA
takeover. Delivery was 14.04.88.
However, that aircraft is pipped by 737-3Y0 G-LGTH. Although not delivered to BA
until 01.04.01 it was originally delivered to Inter European on 13.04.88 - one day sooner than that A320!
So basically it's an A320 or 737 for BA
. I'll opt for the A320 - simply because its sounds strange saying that a major's oldest aircraft is an A320! (Also, it would have had an earlier delivery date if it hadn't been for that repaint from BCal to BA
(And a spooky aside - those two original delivery dates are my sister's and grandma's birthdays).