Air traffic controllers based at Dundee Airport and several other Scottish sites have rejected the latest pay offer in a long-running dispute with management.
Airports operator Highlands and Islands Airports Limited (HIAL) had tabled a revised deal in a bid to end the row which saw the travel plans of thousands of passengers disrupted by 24 hour strikes back in July.
However, the Prospect union has confirmed its members have voted to knock back the new offer, meaning the threat of future strikes remain.
David Avery, Prospect negotiations officer, said no further strike action is planned at the moment, but a work-to-rule which has been in place since April will continue.
“We will now consult with members on how best to move towards a resolution of this dispute and will also meet with the company to try to find an acceptable way forward,” he said.
Hial operates Dundee, Inverness, Sumburgh, Kirkwall, Stornoway and Benbecula airports.
A HIAL spokesperson: “This is a disappointing result.
“We presented a fair and reasonable offer to the Air Traffic Control staff.
“We have been in touch with Prospect and the union has agreed to meet in the near future and we are hopeful that these discussions will be positive.”