There was train disruption on Monday morning due to engineering works over-running from Sunday.
The ScotRail website stated that the service was still suffering severe disruption due to the ongoing works at Lochwinnoch Station.
However, the 8.33pm service was running on time.
The website stated: "Train services between Glasgow Central and Largs are returning to normal but some services may still be cancelled, delayed or revised."
"For live journey updates download the free ScotRail App or check our website at http://www.journeycheck.com/ScotRail.
"We are sorry that you have been delayed today. Dont forget to keep a hold of your ticket and make a claim if you have been delayed over 30 minutes by visiting ScotRail.co.uk/delay-repay"
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