Train stopping at Welwyn Garden City station. Picture: Charlotte McLaughlin (Image: Archant)
A lack of train drivers will cause disruption at Hitchin, Stevenage, Royston and Welwyn Garden City stations today.
There will be fewer services running to and from London Kings Cross and Moorgate along the Thameslink and Great Northern routes via Welwyn Garden City and Cambridge.
The delays are expected to start at about 12pm and continue until the end of the day.
National Rail currently estimate that journey times will be extended by 30 minutes.
There will be replacement buses running to help passengers to their destination.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here