The Public and Commercial Service (PCS) union has announced civil service industrial action on 1 February and until 7am on 2 February, with people advised to check the latest travel advice with operators, travel agents and airlines before travelling.
All passengers eligible to use eGates are encouraged to do so.
The proposed strike action will impact international arrivals at all UK air and maritime ports as well as those travelling to the UK from UK border controls in Calais, Dunkirk and Coquelles in northern France.
Military personnel, civil servants and volunteers from across government are being trained to support Border Force at airports and ports across the UK.
“Border Force are ready to deploy resources to meet critical demand and support the flow of travellers and goods through the border, however those entering the UK should be prepared for potential disruption,” said the Home Office in a statement.
“Please be patient and respect officers who are working to keep our citizens safe and border secure, and supporting travellers during the strike action,” the statement added.
