no direct services from Cheltenham and Gloucester via the Cotswold line on above dates.
As I understand it, Gloucester closed completely today (but the bypass line still open). Cheltenham Spa to Paddington services and Bristol to Worcester services using that link, with buses from Gloucester to Cheltenham Spa, Chepstow and Cam and Dursley. Not sure about Stonehouse / Stroud - I suspect people have to double back at Cheltenham Spa
GWR▸ aren't running the 05:17 Gloucester to Southampton via Swindon and advice on the leg to Swindon has been "use other services - train will start from Swindon". They have given up on the Swindon to Trowbridge section too ... first southbound train at Melksham is the 09:10 rather than the 06:36 .... I suspect that it's coming in from / vis Bath; not sure what (at the least) it couldn't have doubled back at Chippenham.
06:11 Swindon to Southampton Central due 08:07
06:11 Swindon to Southampton Central due 08:07 will be started from Trowbridge.
It will no longer call at Swindon, Chippenham and Melksham.
It will be delayed at Trowbridge and is expected to be 5 minutes late.
This is due to a shortage of train crew.