Glasgow's Subway will stop running on Saturday while four weeks of repairs are carried out.

All services will be suspended to allow for essential renewal works to take place in its “ramps and turnouts” section of the tunnels.

This section connects the surface depot at Broomloan with the tunnels and was installed almost 40 years ago.

The works are part of a £288 million modernisation programme.

The last train will leave Buchanan Street tonight at 11.37pm on the outer circle to St Enoch and all stations south of the River Clyde.

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The last train from Buchanan Street to Cowcaddens and all stations to the north of the River Clyde will leave at 11.29pm.

Services are planned to resume again on Monday August 1.

During the four-week period, a replacement bus service will be provided for Subway passengers who are encouraged to “turn up as normal” to stations.

The bus service follows the Subway route with additional direct services to the city centre from key stations, including Park and Ride facilities at Bridge Street, Kelvinbridge and Shields Road. Services will be every five minutes at peak times and every ten minutes during off-peak.

SPT has introduced a simple flat fare structure for the replacement bus service so all passengers will pay £1 single journey / £2 return and £2.50 all day ticket. Child fares are 50p single and £1 return.

SPT Chairman Jonathan Findlay said: “To date, SPT has achieved all of the modernisation works without any disruption to passenger service which is a considerable achievement.

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"We have now reached a crucial stage in the modernisation plan that requires us - for reasons of safety for everyone involved - to suspend services for a short time during July.

“We apologise for any inconvenience to all our passengers but our full replacement bus service will mean that they can still get to where they want to go.

“All our passengers are encouraged to turn up at their designated stop, allow a little longer for the journey, and leave the rest to us.”

For more information go to the SPT website, at: www.spt.co.uk/suspension