Strike action could affect train services in and out of Glasgow later this month.

RMT members in technician and maintenance control staff working for Hitachi Rail have called a 72-hour strike over a dispute about reducing holiday entitlement.

Trains on the Glasgow to Edinburgh route and to and from Alloa and Lanark could be affected.

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Action has already taken place on July 1 but the union said the dispute has not been resolved and further action will take place.

The RMT said a 72-hour strike has been called from 12.01am on Sunday, July 31 to 11.59pm on Tuesday, August 2.

The union said Hitachi are planning to take 12 days annual leave from them.

Hitachi said it will try to ensure there is no impact on services and passengers.

On the previous strike Hitachi managed to maintain services but unions say there were safety breaches as a result.

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Michael Lynch, RMT general secretary, said in a letter to members: “I would like to thank all RMT members who participated in the strike action on July 1 and 2. The strike action was rock-solid and I want to applaud you and your colleagues for your continued unity and determination.  

“I have been advised that numerous safety breaches were identified on July 1 and 2, as Hitachi tried to keep the business functioning during the strike action.

"Consequently, I have raised the issue of safety breaches with the Office of Road and Rail (ORR) and Hitachi Rail.” 

The strike dates come less than two weeks after ScotRail plans to return to a normal timetable on July 20 following the end of the pay dispute which saw drivers not taking up rest day working.

A Hitachi Rail spokesperson said: "We are disappointed at RMT’s decision to carry out industrial action, especially as the industry is attempting to encourage people back onto the railways.

"We will continue to work with RMT to find a solution and urge them to continue the negotiations.

"In the meantime, we will prepare contingency plans to minimise the impact on passengers if industrial action takes place."

A ScotRail spokesperson said: "The last strike a few weeks ago by Hitachi technicians had little or no effect on our class 385 services due to how reliable the trains are."