Normally the ITV company who produced a show would make a generic ITV-branded trailer that any region could use, as well as a local version to show in their own region, and often a third “version”, which was just the raw footage for companies who wanted to make their own promo for the show in their local branding. (Tyne Tees, incidentally, often just ran the raw footage with a live voiceover and super). Post 1989, I believe there was a dedicated network promotions team who produced the trailers, but the principle was the same.
Even post-1989 the procedure was the same -- a minority of promos were made by Thames/LWT to a common template but I don't think anything really changed other than stricter branding. Some other ITV companies broadly used the same template (YTV in particular) but others such as Anglia and Central continued to use the same style as for their local promos.
And I think Tyne Tees were just behind the curve when it came to running the raw footage with live voice/caption -- in the 1970s most companies did the same thing, but by the late 1980s almost all had stopped (YTV did occasionally until around 1988 for example). Only TTT were still doing this (occasionally) into the 1990s.
Last edited by ttt on 1 April 2019 2:39pm