Power supply problems between Wandsworth Common and Clapham Junction are causing delays of up to 90 minutes to trains and a reported broken down train at West Worthing station is adding to the disruption.
Three out of four of Southern’s lines at Clapham junction are currently blocked as a result.
Gatwick Express services are currently unable to run and disruption is expected to continue until 12pm.
David Kenyon, stranded at Worthing Station, said: “The station is slowly filling up with people.
“All they keep saying is there’s disruption at Clapham Junction.
“We haven’t got a joined-up system and unfortunately staff don’t seem to know what is going on. I use trains quite often and I’m always late.”
A spokesperson for train operator Southern said: “We have a major power supply failure between Clapham and Wandsworth Common.
“We have suspended services in and out of Victoria at the moment.”
A Network Rail spokesperson said: “A major power supply problem between Clapham and Wandsworth Common has disrupted Southern train services into London Victoria this morning.
“Engineers are on site and we aim to resume services as quickly as possible.
“Tickets are valid on all other routes into London and Southern passengers are advised to avoid travelling through Clapham Junction, which is very busy.”
Have you been affected by the delays this morning? Email [email protected]