An employment dispute with airport staff is taking off this morning.

Lockout notices are now being issued against security workers who were planning on striking for three hours later this month in Auckland and Wellington.

E Tu Union said it was because of stalled pay talks that had lasted more than a year.

The strike would be the first in 30 years from airport security staff.

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The union now says it has received lockout notices, and its legal team is looking this morning into exactly what they mean.