A fault with the signalling system between Glasgow Central and Dunlop means trains are currently unable to run between Barrhead and Kilmarnock.
Disruption is expected until 08:00.
Alternative travel advice
Tickets will be accepted between Glasgow Central and Carlisle via Lockerbie with TransPennine Express and Avanti West Coast services until 10:00 at no extra cost.
A replacement bus, running at 07:20 will run between Barrhead and Kilmarnock.
If you have had to drive to another station your ticket will be valid to collect your car on your return journey. Speak to a member of staff to validate your ticket.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner
For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use our Rail Replacement Services page.
You can find the pick-up and set-down location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.
Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.