Work to electrify Scotland’s busiest train line takes a step forward this month.

Overhead power cables are being installed on the Glasgow to Edinburgh line out of Queen Street Station.

The work will take six months with 90 miles of electric cable linking the countries two biggest cities.

Some services will be altered in the late evening to enable the work to be completed as soon as possible.

Most of the work will take place overnight beginning in the next few weeks.

Services after 2130 Sunday to Thursday between October 5, 2015, and March 17, 2016, some services into Glasgow Queen Street, including the Edinburgh, Stirling, Alloa and Dundee trains, will be using diversionary routes and will have extended journey times. A limited number of stations will also be served by replacement bus services.

Alterations will be suspended over the Christmas period from December 11 to January 2.

Rodger Querns, EGIP programme director, said: “The Edinburgh Glasgow Improvement Programme is a massive investment in Scotland’s railway that will help deliver long lasting benefits for both individual passengers and the wider economy.

“Electrifying the line between our two biggest cities will allow us to run faster, longer, greener trains and cut journey times while increasing the number of seats available.”