Commuters can expect disruption on Monday (January 4) as a 24-hour train drivers' strike goes ahead.
The strike, by Arriva Trains Wales drivers who are members of the Aslef union, coincides with the day many workers return to their jobs following the Christmas break.
It will result in all Arriva Trains Wales services being cancelled on Monday and the industrial action may also disrupt early morning services the following day (Tuesday, January 5).
The action will impact the entire Arriva Trains Wales network, which includes numerous services running through Chester railway station .
No replacement bus services will be in operation as there are not enough buses to cover the 1,000-plus services the company runs each day.
Arriva Trains Wales is advising its customers to make alternative travel arrangements for Monday, and to check their train travel plans for Tuesday, prior to starting a journey.
A statement from the company read: "Regrettably, all Arriva Trains Wales services on Monday, January 4 throughout our network are expected to be cancelled due to threatened industrial action by train driver unions.
"Arriva Trains Wales deeply regrets this disruption."
The planned strike is part of a dispute over pay and conditions.
The Aslef union said drivers voted "overwhelmingly" for strike action after management "reneged on an agreement we had reached".
Industrial action will begin at 12:01am on Monday and last for 24 hours, until 11:59pm.
Arriva Trains Wales say the situation is 'liable to last-minute changes' and will notify commuters via its website if there are any further developments.
Drivers were due to walk out in November but the strike was called off at the 11th hour.