A trackside fire at Stockwell caused severe delays and part-suspension of the Northern line on the London Underground.
Northern line disruption
The Northern Line was partly suspended due to the track fire at Stockwell. Tooting Bec station was closed earlier in the day but later reopened.
Tickets are being accepted on London Buses, Thameslink, Great Northern, South Western Railway and London Trams.
Piccadilly line delays
Elsewhere, the Piccadilly Line is severely delayed due to a signal failure at Arnos Grove.
The disruption follows a fire that hit the Tube line, causing severe delays for passengers.
