Couple of queries about the redevelopment
1 - are there any plans to built 2 additional platforms in the main part of the station, i.e. in between platforms 2/3 and 5/6, provided that both platforms 2/3 and 5/6 are reconfigured to fit a new platform island in the middle
2 - what are the plans for the ticket office and entrance to underneath the platforms
3 - when the shed has its 2 platforms reinstated, how is the far side platform going to be reached - subway/footbridge
4 - when is temple meads being resignalled?
5 - presumably when temple meads is resignalled, we will see a number of new signal posts, new track layouts and replacement of lots of track?
Unless I've missed it, there is no grand plan for redevelopment at this time. The council have a planning framework out for consultation, the old Royal Mail building is being demolished, the council want a public walkway under the station, a new southern entrance into the station for the arena and a few other things. I suspect that Network Rail aren't sitting back and waiting for the council to go through the motions, no skin off their noses if it gets pushed back into
CP6▸ as most resignalling and electrification work can be done without upgrading the passenger facilities.
The only thing we know is that resignalling, quadrupling of the Filton Bank and remodelling the eastern part of the station approaches is ongoing. Resignalling has been rescoped to leave out everything south of Bristol
TM‡ in this phase in order to permit electrification. This probably means that the signalbox will not go until Bristol South has been done, so the planned reinstatement of platforms in the old shed for the
IEPs▸ will not happen for a while. So that means IEPs (and electrification) in the main shed.
Whether that means building works in the main shed remains to be seen, Bath is having platforms extended longways and also outwards in order to fit the IEPs and provide clearance for overhead wiring, so conceivably there might need to be similar work in TM.
Note also that whilst the original plan was to electrify Filton Bank first and introduce some new express electric services, leaving Swindon to Bristol TM via Bath until last, it's now the other way round. I'd imagine that the new services can't start until quadrupling is complete.