Passengers are warned to expect delays to services on the Medway Valley Line due to a member of the train crew being unavailable.
Southeastern are warning commuters to check before setting out.
The following services have been cancelled:
9.04am Strood to Tonbridge
10.04am Tonbridge to Strood
1.34pm Strood to Maidstone West
2.03pm Maidstone West to Strood
2.04pm Tonbridge to Strood
3.04pm Strood to Tonbridge
3.04pm Tonbridge to Strood
4.04pm Strood to Paddock Wood
5.04pm Paddock Wood to Strood
Services on the Maidstone East Line have also been delayed due to a broken-down train.
If you have been delayed by more than 30 minutes you can claim compensation at southeasternrailway.co.uk