Good to see some more links and photos of these legendary machines. My earliest spotting days were at York and Doncaster in the early 70s and even now I can still clearly recall the utter thrill of seeing these monsters bellowing through the latter station at full bore. There is no other sound on earth like it and those far-off sunny afternoons spent lolling around on the platform barrows until someone cried "Deltic" always come flooding back whenever I hear one today.
Living in Hull meant we were somewhat detached from most of the hustle and bustle of the main lines, but in 1978 we got lucky; Deltics were allocated to all the Hull-King's Cross trains. I worked in the city centre, so lunchtimes were spent at Paragon station taking in the sights and sounds as they arrived and departed. Travelling home by train after work meant I also got to sample the late afternoon departure as well. Trips to York, Donny or London were timed to travel behind them and sitting in the first coach was mandatory. I was lucky enough to get a ticket for the last trip of all on 2nd January 1982, a sad day indeed as the realisation kicked in that this really was the end. Have to say my interest in railways waned a bit after that as the stuff that was left somehow just didn't quite compare.
My camera travelled with me every day and so I have a fair collection of these monsters in their last four years of service. Feel free to look through some of them here:
https://www.flickr.com/photos/sydpix/sets/72157625258228962/