In 2005, the Scottish Executive announced that the then-closed section of line between the 1989 Drumgelloch station and Bathgate would be rebuilt as a double tracked electrified railway, termed the Airdrie-Bathgate Rail Link.

The link connects with the North Clyde Line at Drumgelloch and the Edinburgh to Bathgate Line at Bathgate, forming a fourth rail link between Glasgow and Edinburgh.

Rail replacement bus services were provided between Bathgate and Haymarket on Sunday 17 October 2010.

As a result of delays with commissioning of the Class 380 trains, insufficient Class 334 trains for the full service were available for the introduction of the intended timetable from 12 December 2010.

[5] Due to inclement weather some intermediate stations to Airdrie are provided with bus services whilst final works are completed.