People travelling to the UK, including those coming home for Christmas, have been hit with a warning for the rest of December.
The Government said it continues to make preparations to minimise queues at the border including training military personnel to support Border Force during strikes. Staff at a number of airports and ports will walk out on a number of dates this month, in an ongoing row over pay and conditions.
Industrial action is due to begin on Friday, December 23, after being announced by the Public and Commercial Services (PCS) Union. Gov.uk guidance now warns UK arrivals should prepare for disruptions at the border.