A rail route across south-west Scotland has closed for nine days to allow a £1m upgrade to be carried out to reduce the risk of weather-related disruption.

The line between Stranraer and Ayr will be shut until 8 December with replacement buses running.

Network Rail said teams would work “around the clock” to improve drainage and reinforce embankments.

It thanked passengers for their “understanding” while the route was closed.

Network Rail said it was necessary in order for the work to be carried out “safely and efficiently”.

It advised passengers to plan ahead and allow extra time for their journeys.

Ross Moran, route director at Network Rail Scotland, said: “This weekend marks the start of a significant investment in the Stranraer line.

“Scotland’s weather is sometimes unforgiving, and heavy rainfall can put real pressure on the railway.

“By upgrading drainage and ensuring key structures are in good condition, we’re making the route stronger and more reliable for the future.”

He said the company understood the inconvenience for customers.

“We know there’s never a great time to close the line, but this work can only be carried out safely when trains aren’t running,” he added.

“We really appreciate passengers’ understanding as we deliver these improvements.”

Mark Ilderton, ScotRail service delivery director, said it was committed to keeping people moving during the “essential work”.

“We have a robust rail replacement plan in place, with clear, up-to-date information to help customers plan their journeys and travel with confidence and reliability throughout the works,” he said.

“We’re grateful for our customers’ patience and understanding while these important improvements are carried out.”