For a non-train guy, there are three aspects of this footage that I find amazing. 1) That you were compelled to film such an ordinary experience; 2) That you labelled and kept all the video tapes until you converted to digital; 3) That you have captured a zeitgeist of yesteryear.
I have a confession to make. I did not video this, but a young trainee did. As he had also filmed me I asked for a copy. Of course, I edited myself out as I didn't want any offers from Hollywood. Once being asked if I wanted to join the Freemasons was bad enough.
NSE everywhere....how I remember it as a kid. Still a few 309s knocking about too, and the 321s were still pretty new and shiny at that point. 30 whole years ago, Christ! Almost everything has changed since then, Stratford area the most. Virtually unrecogniseable now. Better...? Hard to say. :-/
The class 90s for the freight sector were delivered in 1989/90 so they were definitely around in 1990 on all the electrified freight routes, though still quite new.
The cameraman unfortunately missed filming Stratford, which was a pity, as it would have been interesting to see the old, much changed Stratford station.