Strikes are planned by rail staff on Tuesday 21st, Thursday 23rd and Saturday 25th June.
In addition, it is expected that no trains will run to Barnstaple, Okehampton, Paignton nor any in Cornwall. There will be a very limited service on the main line from 0730 to 1830.
GWR is advising passengers not to travel unless absolutely necessary. Trains that run are expected to be busy and may suffer short notice changes or cancellation.
On the days in between these dates, services may be disrupted. Information will be available at http://www.gwr.com/strike and timetables are expected on journey planners from Friday 17th.
The attached maps provide further information about which lines are expected to operate on strike days, and the anticipated impact on 22nd and 24th June.
If you do decide to travel next week, please check train times carefully before you go.