My last flights in the BAC 1-11 were with Dan Air between LGW and MXP, which was then a deserted backwater near the Swiss border. They were used on IT charters to supply skiers in winter and hikers/culture vultures in summer. I can't remember which model they were, but the loads had to be carefully monitored and after takeoff from MXP we had to do 2 or 3 climbing circuits to be able to reach a safe level to traverse the Alps. I used these cheap grey market flights for several years, way cheaper than the BA/Alitalia LIN-LHR monopoly. I think the last flight was in 1992, was this one of the last 1-11 flights/routes in Europe ? There can't have been too many left by then.
For all it's reputation of being seriously noisy on the outside, the flights were pretty quiet and smooth inside the cabin.