Unions are poised to consider official industrial action if a dispute at Rosyth Dockyard is not resolved.
Unite has called on dockyard owner Babcock International to find a solution to the row which led to 300 workers on the MoD’s £6 billion aircraft carrier project staging a wildcat strike on Monday.
The dispute follows reports that an electrical sub-contractor was refused access to the yard after a row with a manager.
Plans for a demonstration outside the yard on Tuesday were called off after Babcock agreed to investigate allegations against the sacked worker.
Unite Scottish Regional Secretary Pat Rafferty said the union had tried to use its influence to encourage members in the workforce to stop their unofficial action.
“There are official and lawful responses that Unite will take on behalf of our members,” he said.
“But this is a dispute the employer has with their workforce and it is for the employer to find a resolution.
“Although Unite will assist in trying to find a solution, the employer cannot expect only Unite to act to resolve workplace issues.
“If this is not resolved we will have to discuss with our members carrying out official industrial action.”
Workers have already warned the strike will continue if the issue is not resolved.
Babcock said they were aware of the situation but as discussions were ongoing it would be inappropriate to comment further.”