https://www.youtube.com/watch?v=P2_FtJ9dJvMAbsolutely fascinating BBC documentary, dated 13th February 1989 - part one of following 'a week in the life' of BR, broadcast as a mix of live and pre-recorded studio segments ... love the puffy jackets and plummy accents.
Bit that stuck out to me was around 12, 13 minutes in where they're talking about the electrification of the ECML, and how you can't 'just add another coach when needed' - this guy shows up, I think it's the prototype alternative to the Class 91s