Bus Eireann has warned that some cross-border bus services face disruption tomorrow.
It is due to a one-day strike in the North and Britain.
Services between Dublin and Belfast, Derry, Downpatrick and Portrush operated by Bus Eireann in conjunction with Translink will be affected, as well as services from Belfast to Athlone, Enniskillen to Belfast and Derry to Longford.