A snapped overhead power line in the London area has caused disruption to train services.
First Capital Connect cut services out of King's Cross
Services between London and Kings Lynn in Norfolk, through Hertfordshire and Cambridgeshire, were due to be restored by Thursday evening.
Limited services were running between Kings Lynn and Royston but none in and out of Kings Cross in London.
Sarah Pinch, of First Capital Connect, said: "Overhead power lines came down between Hornsey and Alexandra Palace."
She added: "We had no choice but to turn the power off for safety reasons because one of the cables had snapped.
"At one point no trains were running into London. Now this is causing residual delays as we try to get rolling stock and staff into position to deal with the evening peak period when we hope to have all services restored."