London Liverpool Street trains are facing disruption after a person was hit between Tottenham Hale and Cheshunt.
All lines between these stations are closed, with trains being cancelled, delayed or diverted via Seven Sisters.
The services affected include Greater Anglia, the London Overground and the Stansted Express.
Meanwhile, delays to the Hammersmith and City Line have finally cleared up, after the whole afternoon saw disruption which ran into the evening.