GLASGOW Subway passengers were facing a third day of delays today.

Cowcaddens station remained closed this morning as work continued to repair a section of the tunnel wall running to Buchanan Street.

Last night, the inner circle was re-opened, although Cowcaddens station is still closed.

However, passengers travelling on the Subway, which carries 40,000 people every day, will not be able to get on or off at Cowcaddens on the inner circle.

Restrictions will also stay in place on the outer circle.

Two shuttle trains are running on the outer circle, one from Govan to St George's Cross, stopping at all intermediate stations.

A second train will run from West Street to Ibrox, stopping at each station in between.

SPT said trains on the outer circle would not stop at Bridge Street, St Enoch and Buchanan Street because it would put too much pressure on the transport system and increase journey times.

From 7am today, SPT was also running extra coaches from St George's Cross, Shields Road and Hillhead to Buchanan Street.

Services were affected after a problem was discovered with the tunnel wall during checks on the Subway on Monday.

A statement from SPT said: "Cowcaddens station remains closed. The inner circle is in operation and a reduced Subway service is running on the Outer Circle from Govan to St George's Cross and West Street to Ibrox.

"Free shuttle buses are also running currently from St George's Cross Subway to Buchanan Street via Cowcaddens.

"We would like to again thank all our customers for their patience during this time."

The last major disruption to hit the Subway came in 2009 when work to build the M74 extension led to an 11-hour shutdown of the entire system. Work on a section of the extension was halted over fears piling work has caused cracks in some Subway tunnels.

On 24 March 1977, cracks were noticed in the roof of Govan Cross station, leading to suspension of services until May 2.

A £1.3million programme to improve the Subway's underground tunnels was approved last year by SPT.

The system is also undergoing a £300million renovation project, which will include driverless trains.

The Subway opened on December 14, 1896 and is the third-oldest underground metro system in the world after the London Underground and the Budapest Metro.

Formerly a cable railway, the Subway was later electrified, but its twin circular lines were never expanded.

Meanwhile, as reported in later editions of yesterday's Evening Times, rail passengers travelling to work on the Cathcart Circle also faced delays due to a signalling problem.

A temporary line closure was put in place between Pollokshields East and Mount Florida, at 9pm last night, while Network Rail engineers carried out cable repairs.

The line was expected to re-open today.

caroline.wilson@ eveningtimes.co.uk