Trains between Haslemere and Havant delayed by up to 20 minutes
Trains between Haslemere and Havant are delayed by up to 20 minutes due to a signal failure.
South West Trains said the disruption is expected to last until about 2pm, while some services could be altered.
It added that the delays would be caused by trains having to come to a stand at a couple of points in their journey so the driver can receive verbal permission from signallers to continue.
Trains on other lines may have to run at reduced speed while disruption is ongoing.