Rail services to London face major disruption because of a broken-down freight train.
The train is blocking the line between Ingatestone and Shenfield, in Essex. Delays are affecting trains from parts of Essex, Suffolk and Norfolk.
Another locomotive has been sent to recover it, but no estimated time has been given for the line to reopen, said Greater Anglia.
Teams from Network Rail will also be sent to help, the train operator added.
