RAIL strikes will once again affect Great Western Railway services this weekend, the company has wanted customers to "Check their journeys".

Strike action by the RMT will affect GWR services and other train operators across the country this Saturday July 29.

In addition, there could be further disruption from Monday, July 31 to Saturday, August 5, and from Monday, August 7 to Saturday, August 12 due to industrial action short of a strike by the Aslef union.

GWR has said that this is likely to cause some short-notice alterations or cancellations and ask passengers to please check their journeys before setting out.

On the RMT strike days a reduced, revised timetable will operate across several train operators, including GWR.

Many parts of the GWR network will have no service at all and many services will start later, finish much earlier and only operate for a limited period during the day.

During action short of a strike and the days after strikes, services could also be affected by a limited number of short-notice cancellations and alterations.

The Night Riviera Sleeper service will not run in either direction from Sunday, July 30 until Friday, August 11, resuming on Sunday August 13.

If you intend to travel where trains are running, please check before doing so.

Trains that are operating will be busier than usual because GWR will not be able to offer the normal service frequency.

Other train operators are also affected by this action, so onward travel could also be affected.

Where GWR is able to run services, they are expected to be extremely busy and bus replacement services are not able to be provided.

Customers who purchased tickets but did not travel can claim a full refund or amend their ticket.

Those who travel and are delayed may be entitled to Delay Repay compensation if they are delayed by 15 minutes or more.

To help customers, tickets for strike days will be valid for travel on alternative days on GWR services, as per below:

Tickets for Saturday July 29 can be used the day before or up to and including Tuesday August 1.

Season-ticket holders can apply for compensation through the Delay Repay scheme.

GWR’s Refund policy remains in place, if you hold a return ticket, you can claim a refund of your unused full fare, even if only one leg of your journey is affected.

Online journey planners have been updated and can be checked here.