Around 230 union members, almost half of the staff at the mill, are set to go ahead with their first four-hour stoppage on 23 March.

This will then be followed by a four-hour stoppage the following week, which will then escalate to two four-hour stoppages a week until the situation is resolved.

Amicus Scotland assistant branch secretary Willie Wallace said there had been little response from management at the mill, following talks breaking down on 15 March.

"What we (Amicus) are doing is holding the door open for more talks, but it does not look hopeful," said Wallace.

"The nearer we get to the stoppage date the harder it will be to stop this," he added.