TfL: Severe rail delays on London Overground at Monday rush hour - Jubilee line minor delays
and live on Freeview channel 276
At shortly before 8am commuters were facing disruption between Stratford in east London and Richmond and Clapham Junction in the south west.
The delays were due to a "points fault" at Caledonian Road & Barnsbury.
TfL said there was a good service on the rest of the route and on all other other London Overground routes.
The Jubilee line was experiencing minor delay, which TfL put down to "train cancellations".