Birmingham Airport staff in Christmas strike ballot
Some staff at Birmingham Airport staff are being balloted over taking industrial action over Christmas.
The Unite union said its members had rejected a 2.5% pay offer which had followed a pay freeze since 2009.
It is understood up to 250 members, mainly security staff, are being balloted over taking action in the week up to Christmas and on 25 December.
Birmingham Airport said contingency plans would be put in place to minimise disruption if the strike went ahead.
Unite has described the pay offer and a one-off payment of £150 as "paltry".
A spokeswoman for the airport said it had tried to resolve the issue by "increasing its offer to the equivalent of 3.3%".
But the union said in "real terms" the offer amounted to 2.5% and was beneath the cost of living and increases in utility bills.
The airport spokeswoman added the airport would remain open if the industrial action went ahead.
"Contingencies have been tested and are in place to minimise any disruption that potential industrial action aims to cause the travelling public," she said.