WHBM Bonus Question: What was the last domestic scheduled flight in the British Isles that required a flight engineer and a 3-man crew?
If it's not a Trident, then I'm thinking of British 727 operators of which there sure weren't many, especially in scheduled service.
After a couple cups of coffee on this cloudy afternoon here at 65°N, it suddenly came to me that BA operated a 727-100 at some point in the late eighties. It wore a hybrid livery - mostly ATA as I recall. I have a postcard of it. In any event, I have no idea what route it may have been operated on or why BA even leased an aircraft so different from anything else in their fleet. The -100's not a very big plane. Maybe they used it for extra capacity on a heavily travelled route like London - Manchester or up to Scotland somewhere...