Unions have been meeting with management at Brittany Ferries to try to reach an agreement to end wildcat strikes by French employees that have halted services between Britain, France, Ireland and Spain.
The Armorique which sails between Plymouth and Roscoff has been tied-up in France for a week. Routes from Plymouth to Santander are also cancelled.
The dispute centres on plans by Brittany Ferries to change the crews' terms and conditions to cut costs to keep the company competitive. They include reducing salaries and cutting the number of crossings.
Brittany Ferries suspended services on Friday after the second of two walk-outs by staff, which left passengers stranded on both sides of the channel.
"An accord emerged" late last night (Wednesday) but when the agreement was put to staff on board the Armorique today it looked likely to be rejected.
The company says the losses due to the shutdown of services would run into millions of Euros.
Now the crew of the Armorique in Roscoff has rejected the latest deal it remains unclear when sailings will resume.