Nottingham was due to be next, but I've heard the Beeb have postponed that pending a total rethink on the technical architecture of the English regions. I suspect they're thinking along the lines of a heavily IP centrally based solution, rather like ViLoR the scheme being rolled out for local radio
Yep - VILOR has caused a lot of blue sky thinking in the BBC. It's delivering very effective savings AIUI, and if they can do the same for TV I think they will.
IP Production may well be a key element of this. (Cameras in Nottingham, but playout servers, vision mixer, router etc. all somewhere central and linked over IP. If you could co-site the production facilities for multiple English regions you could potentially deliver significant savings...)
There's been a lot of talk about IP production recently. Assuming you can have a reliable, fat, low latency (in both directions) fibre link, you could (IN THEORY) dispose of the need of a manned truck for OBs. Just a relatively small van with the CCUs, and interfaces for audio and talk-back feeds that connect to the fibre(s) leading to the 'cloud'. The production gallery could be anywhere on the planet ! The discussions are, how much of the production team actually needs to be on site (after all they normally sit locked in the truck anyway ! )
Big savings for accommodation, transport, and subsistence rates, so the beancounters are interested