A spokesperson for AGS Airports, which owns and manages Aberdeen International and Glasgow airports, said: “We are extremely disappointed that the trade unions have served notice of industrial action. We have been in talks since January and, despite attending Acas, there has been no willingness whatsoever on the part of the unions to engage in aconstructive negotiation.

“We made a significant improvement on our initial pay offer which was increased from 1.8% to 3% in line with their demands. This was rejected by the trade unions without further consulting their members. In regards to our final salary pension scheme, it is simply unaffordable with the cost to the company due to rise to 24.7% per employee. We tabled a generous compensation package for the remaining members which again was rejected by unions without further consulting their members.

“As always, we remain open to continuing dialogue, however, we will now put our robust contingency plans in place to ensure it will be business as usual at Aberdeen and Glasgow airports for our passengers and airlines on both Friday 7th and Monday 10th of June.”