A row over payments for conductors working days off has meant services on Sundays have been slashed for six months. And a second round of strikes has now been threatened in November to coincide with the COP26 climate conference in Glasgow.
Scottish Labour said it would be a "national humiliation" if SNP ministers failed to convince Abellio - the private firm responsible for running ScotRail - and the RMT union to reach an agreement before then.
Transport minister Graeme Dey told MSPs negotiations over payments were a responsibility for the transport operator and unions.He said a "time-limited enhancement" brought in to compensate conductors and ticket examiners working rest days was no longer required as 140 additional staff had been hired.
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