Extra carriages are to be provided on more peak-time rail services at Dumbarton.

ScotRail says the move, from Monday, 20 May, will provide 2,500 extra seats every weekday.

The services affected are:

07:51 Dumbarton Central to Springburn

15:56 Dumbarton Central to Springburn

16:52 Springburn to Dumbarton Central

The move will follow the introduction of new timetables across the region on Sunday, May 19

ScotRail said: "Performance improvements have also been made on the routes.

"While there are no changes to origins and destinations, trains have been retimed earlier or later to improve the spacing of trains through key sections of the route.

"For much of the day, there are changes to the order of trains through Partick to further improve the spacing of trains."

More high-speed trains and brand-new class 385 electric trains will also enhance the service.

ScotRail added: "With 20,000 seats being added to services, the total number of weekday seats available for customers is now 625,000 – a massive increase of 115,000 since the start of the franchise.

READ MORE: Jackie Baillie calls for Scotrail to lose its licence

ScotRail Alliance managing director Alex Hynes said: “The timetable changes we are making will see even more improvements on Scotland’s Railway, with the unprecedented investment in new trains and infrastructure delivering faster journeys, more seats and more services for our customers."

Michael Matheson, cabinet secretary for transport, infrastructure and connectivity, said: “This Scottish Government wants rail to continue to grow, making it an attractive alternative to the car.

“We also want passengers to benefit from the additional capacity and look to the ScotRail Alliance to ensure as smooth a timetable change as possible.”

News of the extra-peak time seats comes after scathing criticism of the service from Jackie Baillie MSP who earlier this year called for ScotRail/Abellio to be stripped of the rail franchise.

She said: “It is a regular occurrence that Helensburgh, Balloch and Dumbarton passengers endure delays alongside being crammed in like sardines thanks to a lack of carriages during rush hour services.

“Passengers have had enough, and this is reflected in this year’s satisfaction levels being well below ScotRail’s own targets.