A Unite representative has made a further call for the union and the Department of Community, Culture and Leisure to go to arbitration over the bus drivers' terms and conditions dispute.
Months of negotiations have so far come to nothing, resulting in last week's three-day walkout by drivers.
The DCCL has so far resisted calls for the matter to be decided by an independent arbitrator, a move which would culminate in a binding settlement.
Unite's Eric Holmes says that's what needs to happen:
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Steam Packet says the situation is hugely disappointing