Yes, back in the day when the presentation department made a few trails a day in a gallery down the corridor (some were even live) they booked a different voiceover artist to the duty announcer in Con. That working practice kind of stuck, so when lots more trails were made routinely (and recorded to tape) they continued to book seasoned and familiar voices like Graham Skidmore, Mitch Johnson and Alan Deadicoat for trails like Saturday Night Highlights, while programme voice over artists might be booked for a trail for their own show. There were plenty of other regulars. I think the management liked that fact that trails voiceovers and channel announcers were separate. The announcers were very much the voice of the channel .. sit up, pay attention, a programme is now starting .. whereas the stuff in between was "promotions".
In the late 90s there were recording sessions from 9am until 6pm every weekday to get all the trails made. The trails, having been edited elsewhere previously, would be sound balanced, captions added and the voiceover added, the tapes dubbed so BBC One and Two had their own copy and several vhs copies were made for logging, archiving and previewing purposes at the same time. Busy and time consuming work for a budding
VT operator. Especially when you consider all the tape labels week hand written in those days too and every transmission tape had to have the appropriate paperwork completed too. One of the first shifts I did in there, back in 1996, was the B team (BBC Two) and they'd
booked Penelope Keith to voice a trail for something like "100 years of Country Life Magazine". Totally star struck as she walked in. The smile was soon wiped off my face as a bunch of tapes was hurled in my direction and I was told to load them up pronto.
Several versions of each trail would be made all in one go, so you could end up doing it half a dozen times to end up with:
Generic
Coming Soon
Next Thursday
Thursday
Tomorrow
Tonight
In half an hour
Trails were recorded on tapes starting at timecode 20:00:00:00 to distinguish them from programme tapes that (should) start at 10:00:00:00. Variants of trails started at 20:00:02:00 then 20:00:04:00 etc.
Daft the things you remember eh?