I generally flew short haul so ended up on numerous 1-11s, 737s and ATP's so this is my series of timetable memories of BA.
I used to fly to Bilbao, Cologne and on the BA Shuttle and the NCL route, which was not a shuttle even though it is call-signed as shuttle these days.
I bought a Highland Rover ticket which gave you 8 flights around the mainland and Scotland - one of my favourite holidays. I did ABZ-KOI-LSI-INV-BEB-SYY-GLA-ABZ all on the Budgie.
A diverse range of products sold by BA in a diverse series of markets - all without the oneWorld alliance and internet capabilities.