Caledonian Sleeper Limited (CSL) is seeking to establish a multi-supplier Operational Support Engineering Framework to provide a compliant, agile and cost-effective route for the procurement of reactive, planned and minor engineering and operational support services required across CSL operations.Caledonian Sleeper Limited (CSL) is seeking to establish a multi-supplier Operational Support Engineering Framework to provide a compliant, agile and cost-effective route for the procurement of reactive, planned and minor engineering and operational support services required across CSL operations.