From the FGW website :

05:40 Weymouth to Bristol Parkway due 08:28
This train is run short formed with 1 carriages between Weymouth and Bristol Parkway.This is due to an earlier train fault.

06:00 Portsmouth Harbour to Cardiff Central due 09:41
This train will run short formed with 3 carriages between Westbury and Bristol Temple Meads.This is due to an earlier train fault.

07:25 Bristol Parkway to Westbury due 08:36
This train has been terminated at Bath Spa.It will no longer call at: Freshford, Avoncliff, Bradford-On-Avon, Trowbridge and Westbury.This is due to a train fault.

07:30 Cardiff Central to Portsmouth Harbour due 10:54
This train has been revised.It will additionally call at: Freshford and Avoncliff.This is due to an earlier train fault.

07:33 Weston-Super-Mare to Cardiff Central due 09:24
This train has been revised.It will additionally call at: Lawrence Hill and Stapleton Road.This is due to an earlier train fault.

08:03 Bristol Temple Meads to Avonmouth due 08:30
This train has been revised.It will no longer call at: Lawrence Hill, Stapleton Road, Montpelier and Redland.This is due to a problem with line-side equipment.