Commuters face possible delays on train services across West Yorkshire this weekend.
Replacement bus services are running on Northern Rail services between Leeds and Knottingley due to engineering works today (Saturday).
There are also delays in Halifax with some trains having to run at a reduced speed due to signalling problems.
On Sunday (July 19) no trains will serve Castleford railway station due to engineering work.
Replacement bus services will run to Leeds, Knottingley and Normanton.
For more information visit www.northernrail.org