There are currently delays on the Great Northern line due to signal failure between Hitchin and Cambridge.
Disruption is expected until 5pm, with train operator Govia Thameslink reporting trains may be cancelled or delayed by up to 20 minutes.
In a statement on its greatnorthernrail.com website, Govia said: “There is a reported points failure, and Network Rail, who own and maintain the equipment have staff attending to effect repairs.
“While this is ongoing, our services may be delayed or subject to alteration.
“Once the fault is repaired, Great Northern will be working to restore the train service to the normal timetable as quickly as possible. Great Northern are sorry for the problems this disruption may cause you.”
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