This was posted earlier:
https://www.gwr.com/travel-updates/live-network-updates/disruption-informationAmended train service Sunday 24th June
Last updated at 16:04 24/06/2018
Due to a shortage of traincrew, GWR▸ services between London Paddington, Bristol Temple Meads, South Wales, Worcester and Cheltenham will be significantly amended today; Sunday 24th June 2018.
Impact on your journey:
Due to the large number of alterations, services are expected to be extremely busy. Most affected train services have another train service within 60 minutes.
Ticket acceptance:
If your train service has been cancelled, your ticket will be valid with CrossCountry between Penzance and Cheltenham Spa and also with South Western Railway between Exeter St David's and London Waterloo.
If you have a ticket(s) dated for today Sunday 24th June and have an advance purchase ticket(s), you will be able to travel on the train service before or after the cancelled train. If you have been unable to travel due to the cancellations today caused by a member of train crew being unavailable, your ticket(s) will be valid for travel tomorrow; Monday 25th June 2018.
Real-time travel updates for your journey can be found at GWR Today.
Train services between London Paddington, Bristol Temple Meads and Weston-super-Mare
15:30 Bristol Temple Meads to London Paddington, this service is cancelled.
16:00 London Paddington to Bristol Temple Meads, this service is cancelled.
16:30 London Paddington to Bristol Temple Meads, this service is running.
17:00 London Paddington to Bristol Temple Meads, this service is cancelled.
18:00 London Paddington to Bristol Temple Meads, this service is cancelled.
19:00 Bristol Temple Meads to London Paddington, this service is running.
19:30 Bristol Temple Meads to London Paddington, this service is cancelled.
20:26 Weston-super-Mare to London Paddington will terminate at Bristol Temple Meads
21:00 London Paddington to Bristol Temple Meads, this service is running.
Train services between London Paddington and Cheltenham Spa
15:33 Cheltenham Spa to London Paddington, this service is cancelled.
12:27 London Paddington to Cheltenham Spa, this service is cancelled.
Train services between London Paddington, Swansea, Hereford and Carmarthen
16:27 London Paddington to Hereford, this service is running.
19:15 Swansea to London Paddington, this service is cancelled.
Train services between London Paddington, Exeter St David's, Plymouth and Penzance
11:27 London Paddington to Paignton, this service is cancelled.
13:00 Penzance to London Paddington, this service will start at Exeter St David’s
13:37 Penzance to Exeter St David’s, this service will terminate at Plymouth.
14:50 Plymouth to Penzance, this service is cancelled.
14:57 London Paddington to Penzance, this service will terminate at Exeter St David’s.
15:00 Penzance to London Paddington, this service will start at Exeter St David’s
15:45 Paignton to London Paddington, this service is cancelled.
16:12 Plymouth to London Paddington, this service is running and will call additionally at Ivybridge.
16:13 Penzance to London Paddington will start at Exeter St David’s.
16:57 London Paddington to Penzance, this service is running.
19:00 London Paddington to Exeter St David’s, this service will terminate at Bristol Temple Meads.
19:00 Penzance to Plymouth, this service is cancelled.
19:42 Plymouth to Penzance, this service is cancelled.
19:57 London Paddington to Plymouth will terminate at Exeter St David’s
22:58 Plymouth to Exeter St David’s, this service is cancelled.
Train services between Plymouth and Penzance
From 18:25 until 20:26 there are no train services running from Plymouth to Penzance. We are currently struggling to source replacement road transport to cover the gap in the train service
GWR
14:57 London Paddington to Penzance will terminate at Exeter St David's at 17:18.
CrossCountry
10:08 Edinburgh to Penzance will terminate at Plymouth at 18:53.
GWR
19:42 Plymouth to Penzance is cancelled.
The next train service to run on this route will be:
16:57 London Paddington to Penzance, due to depart Plymouth at 20:26. This train service is expected to be very busy as a result of the gap in the train service.
Compensation:
If your train service was delayed or cancelled, you could be entitled to a refund or compensation, please check our Refunds and Compensation page for more information
At least they are being up front about it with this appearing on the front page of the GWR. You have to ask when is this going to end?
This also appeared on GWR Twitter Feed about an hour ago:
From now until 20:25 there are no train services running from Plymouth to Penzance, and no replacement transport available. Next trains at 20:25, 20:50 & 21:35. Tickets on this route this evening will also be accepted on services tomorrow.