But what of HTV pre-UNM? Certainly, it pre-1993, HTV had 'HTV Wales' and 'HTV West' idents, as well as generic 'HTV' ones for joint continuity. This suggests that when they were showing the same programme, a generic announcment from Cardiff was heard in both Wales and West, yet HTV West had in vision announcers back then, which surely, at least in prime time, did all the West's junctions? What about after 1993? Both region's used the same ident and apparently schedule variations between the two were reduced outside of region-specific programming, so does that mean joint continuity was heard much of the time?
Before the launch of S4C there were three HTV services: a Wales service with Welsh & English language news programmes (the half hour programme was 15 mins in each language), a West service with the West's news programmes and a 'General Service' which would have the first bit of the West's news and the English version of the Wales news. The General Service was run from Wales, and I would assume that throughout the 80s and 90s, Wales continued to provide the backbone of the continuity, and at times where there were no announcers on duty in Bristol, it was just simply "HTV" on air.
There were certainly announcers based in Bristol during the 1990s. HTV West actually continued in vision continuity until about 1994. Perhaps this is when things were scaled back in Bristol. It's a shame that Phillip Banks doesn't post on here anymore. He was HTV West's last announcer, having started in 1994. Several sources say he finished in 2000 when continuity moved to Southampton, but there are clips of him on HTV West in 2001, and at several points on here he referred to playing out announcements over a feed from Southampton.
I've got a vague memory of him becoming freelance after the move to Southampton, and he used to announce from home via an ISDN line.
And it would appear that HTV West's transmission came from Cardiff too until sometime in 2000 when it was moved to Southampton. This left only HTV Wales and Westcountry at Cardiff. Of course, in October 2002, they were reunited with HTV West in London, though Cardiff retained its own announcers for a few years longer.
From October 2002 onwards the local Wales announcers would pre-record something like a week's worth of announcements in one sitting and they would get played out at the relevant times.