The UK public faces further travel chaos at airports over Christmas due to planned strikes by border staff, the home secretary has warned.
Suella Braverman said people should "think carefully" about their plans as "they may well be impacted".
Staff at six airports will stage walkouts from 23 December to Boxing Day and from 28 December to New Year's Eve. The action comes on top of planned strikes by Eurostar employees and train and rail workers.
It is the first Christmas since 2019 that airlines have been able to operate without widespread Covid restrictions and up to 2mln passengers are expected to arrive between 23 and 31 December at the airports where the strikes will take place, according to aviation analytics firm Cirium.
It said that more than 10,000 flights are scheduled to land at Heathrow, London Gatwick, Manchester, Birmingham, Cardiff and Glasgow airports during the period.
Around 1,000 Public and Commercial Services (PCS) union members - including people who work in passport control - are taking industrial action after the Home Office offered workers a 2% pay rise instead of the 10% they requested.
On Thursday, Braverman said: "If they go ahead with those strikes there will be undeniable, serious disruption caused to many thousands of people who have holiday plans.”