As is now customary Scotrail will be operating a good train service on 26 December in the Strathclyde (Greater Glasgow) area- also Glasgow to Edinburgh, Perth, Alloa, Dunblane, and Dundee also Edinburgh to Leven, also for the first time in very many years from Edinburgh to Aberdeen.
Possibly the effects of keen competition from the express buses.
Stagecoach East Scotland have not yet announced their Christmas service plans.