The website says you can upgrade on the following routes, subject to availability:Upgrades are suspended with no replacement date now lined up as far as I'm aware.
If/when it comes in I'd be amazed if anyone with any sort of first class ticket had issues in there irrespective of whether it's official policy or not.
- Shrewsbury - Birmingham
- Cambrian Line: Aberystwyth/Pwllheli - Shrewsbury
- North Wales Coast Line: Crewe - Holyhead
- Marches Line: Newport - Crewe/Manchester
- South Wales Mainline: Swansea - Severn Tunnel Junction
- West Wales Lines: Swansea - Fishguard, Milford Haven and Pembroke Dock
Not only that. If the Standard Plus area is only fitted to 3 car units, but ETCS is only fitted to 2 car units, how will it work on the Cambrian, or through services to Birmingham International?
I had the upgraded seat from Crewe to Newport on 8 August with no charge, but the only other time I’ve had it was from East Didsbury to Manchester Oxford Road when it was first introduced and it was definitely declassified then.