Thousands of commuters face severe disruption on their journeys home tonight, because of problems with overhead wires at Radlett in Hertfordshire.
Three train companies have been affected - Southeastern, East Midlands and First Capital Connect.
Trains are unable to run between St Pancras International and Luton on East Midlands services.
First Capital Connect is also suspended between West Hampstead and Bedford.
And Southeastern trains are suspended between Denmark Hill and Kentish Town.
More top news
A woman who radically overhauled her diet to cure a rare disorder she suffers from has become the fastest selling food author ever.
Singer, guitarist and pianist Joan Armatrading will be in London next month for the climax of her final world tour.
The man identified as the Islamic State militant known as "Jihadi John" was a "popular" schoolboy who loved Manchester Utd and S Club 7.