Now that we are going on about BHX in the old days, I remember a return flight many years ago doing CPH–BHX–CDG. It was a Maersk Air UK-operated BAC 1-11 on the first leg and a TAT-operated Fokker 100 on the second leg – both BA franchises. Might even have been an F70 outbound.
Connection time at BHX was only 15 minutes one way and 25 the other but our TA assured me that this would not be a problem. And to my amazement – time from exiting incoming flight to standing at the outbound gate was less than 10 minutes including a bag scan at BHX flight connections.
You try and tell the young people today that, they won't believe you! :-)