Unions are warning of bank holiday chaos at Liverpool Airport as 80 workers plan a 36-hour strike.
Workers from aviation rescue and fire fighting services, the control room, engineering and driver operations and airport bird control will walk out during the bank holiday weekend.
The strike, from 7pm on August 23 to 7am August 25, will be followed by a further 12-hour strike beginning at 7am on September 3.
The GMB union warned further strike dates will follow after management offered a below inflation pay increase of 2%.
Eddie Parker, GMB organiser, said: "We have informed the company strike action will not be suspended unless a 3.6% increase is offered.
"The company has allegedly employed outside third party companies to undertake the responsibilities presently undertaken by the aviation rescue and firefighting service and bird control personnel.
"GMB is currently unaware whether the outside agency workers have the necessary specialised skill set and personal fitness standards required to undertake these specialist roles.
"Whilst Liverpool Airport Ltd has financially invested in developing the airport over recent years, the same sadly cannot be said of their investment in their employees – who have had enough of being taken for granted by their employer."
