RAIL union leaders and Labour politicians called for striking Caledonian Sleeper workers to be offered a “fair deal” today as they warned staff have been “left out in the cold.”

The RMT said that its members working on the sleeper service are taking industrial action on Friday and Saturday because of an unresolved dispute about pay and conditions with operator Serco.

Action began at 23:59 on Thursday with a lively picket in Glasgow which included dancing, a rally and contributions from former Labour leader Jeremy Corbyn who offered solidarity to the workers and said that he was fully in support of the action.