Surely in an organisation the size of the BBC if there really is nobody else in Bristol who can record the anno they could arrange a swap with another region to do each other's?
Yes anyone with a half decent voice can do it. But they might well have only noticed in the evening that it was needed and therefore only a handful of people there.
At least he didn't introduce himself and then appear straight away as the regions did in the 80s
Or even get the duty London, Glasgow, Cardiff and Belfast announcers to record a few each.
That's really over complicating things. As I say all it needs is for the region to get a presenter or reporter, or even a member of production staff with a half decent voice into an edit suite and talk into a mic. Not difficult
When I worked in regional news they did that a lot and it sounded fine, the problem was the script. The editor of a regional documentary one-off wrote and voiced the continuity anno once (I think she insisted on it!) not only did she not have a great voice but it went on for ages. She also started it 'now on 1....' which hadn't been heard for many years by then