Scotland's railways risk grinding to a halt during one of the busiest times of the year as workers plan strikes on every Friday and Saturday in December.
The RMT union is threatening to significantly escalate its dispute with ScotRail - which is controlled by the Scottish Government - after rejecting its latest pay offer.
More than 2,000 staff including conductors, ticket examiners, and station staff will walk out on Fridays and Saturdays from December 2 to December 24 - including Christmas Eve.