There were issues on the SWT route to that area as well!
Saw issues on FGW from Paddington so, with an open ticket, headed to Waterloo to get a WAT-BRI service, with the aim of catching the 18:15 direct (17:15 only would have got me there 15 minutes or so earlier according to the timetable).
17:15 Exeter service still in the platform at 17:30, whereupon everyone in the unit got out and was sent back to the concourse due to a train failure. Unit reserved for the 18:15 was then used for 17:15 and set off about 35 late. At 18:00 the incoming EXE arrived, and I assume for various operational reasons this couldn't be used for the 18:15 as they got new stock in to form the 18:15 which set off 25 late.
That was terminated at Salisbury due to a faulty cab radio with new stock provided to continue 2 separate units onwards for EXE and BRI, the latter definitely arriving 50 late (argh, just too quick to get delay repay!). Top marks to the guard however for keeping us all informed and seeming genuinely as frustrated as the passengers.
Not SWT's fault, but not a good day for anyone wanting to go West!