Security staff at Luton Airport are to go on strike over the Bank Holiday weekend over what they say are "heavy-handed" changes to their shift patterns.
Members of the Unite union will walk out from Thursday to June 3.
It will be the latest in a series of strikes at the airport after staff also staged protests between May 1 and 5 and then again from May 7 to May 13.
Unite say their members are angry at plans to push through a new shift pattern which could lead to security staff working an extra 15 days a year.
"Security guards at Luton Airport are preparing to step-up their campaign against management’s heavy handed changes," Unite regional officer Jeff Hodge said.
“Unite believes the recruitment of security staff has not matched increasing passenger numbers and the airport is heaping the burden on its existing staff.
“The workers are standing firm and are determined to ensure the airport treats them fairly. The airport must suspend the implementation of the new shift pattern to allow further talks. It's time for management to get around the negotiating table to reach a fair deal."
As was the case with the previous strikes, the airport will again have "robust contingency plans" in place to deal with any potential disruption.
"We would like to reassure passengers that this strike involves only a small number of our security staff," an airport spokesperson said.
"During previous action by the same group of Unite members earlier this month, there was no disruption to passengers with average wait times of five minutes.
"We have the same robust contingency plans in place this time and remain open to further discussions with Unite.”