Highlands and Islands Airport Limited (HIAL) workers will soon be voting regarding whether or not they should engage in industrial action in response to management’s rejection of their pay increase proposal. Prior to the holidays, the union had reached a tentative agreement with management regarding wage increases and a plan to address staff shortages. However, since then, ministers have decided to reject that plan. If HIAL workers go out on strike, seven airports will be negatively impacted.
See "Air traffic controllers hold strike ballot", BBC Scotland, February 1, 2019