First Great Western strike - which trains are affected?
Last-minute talks to avert a 48-hour rail strike on First Great Western services have failed, according to the RMT union. That means, services between London, the west of England and Wales will be affected, as of teatime last night.
Below, you can see a map of all the lines which fall under this area. Click on the map to enlarge.
Red lines are not expected to operate. Black lines have a limited peak service. Yellow lines have a reduced service. Green lines are normal.
Mick Cash, RMT general secretary, said: "The company still feel that the configuration of the new super express trains is out of their control and that it would be in their best interests to have 'driver-only' operations and to remove the buffet cars."
"That position is totally unacceptable and the union is clear that the design of the new fleet of trains is a matter for First Group and that there is still time to modify the rolling stock," he said. Last week's ballot saw 80% of workers supporting strike action.
A FGW spokesman said: "Progress has been made, sadly not enough progress for the RMT to be able to cancel their strike at short notice."
First Great Western - "Time restrictions on tickets have been lifted from now until the end of service today. Passengers can use tickets for any time train."