Further strike action planned at 10 Highlands and islands airports
Prospect said firefighters and security staff will walk out over different dates in March.
Airports in the Highlands and islands face additional strikes after a second union announced members plan to walk out in a pay dispute.
Prospect said firefighters and security staff will walk out of 10 Highlands and Islands Airports Ltd (Hial) airports in March.
The announcement comes as Unite workers are currently on the final day of a three-day strike at 10 airports in the group.
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