The incident on the tracks means that all lines between London Waterloo and Clapham Junction were closed, and major disruption is expected until the end of the day.
Lines have now reopened, but Network Rail are warning that trains still face being cancelled, delayed by up to 90 minutes or revised.
The incident means that services to other stations beyond Clapham Junction such as Wimbledon and Richmond have also faced major disruption.
A British Transport Police spokesperson said: “We were called to Queenstown Road railway station at 11.49am on 9 April to reports of a casualty on the tracks.
“Paramedics also attended and sadly a person was pronounced dead at the scene. This incident is not being treated as suspicious, and a file will be prepared for the coroner.”
:: If you are experiencing feelings of distress, or are struggling to cope, you can speak to the Samaritans, in confidence, on 116 123, email [email protected], or visit the Samaritans website to find details of your nearest branch.
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Live updates
Elizabeth line update
Minor delays are affecting services between Hayes & Harlington and Reading as urgent track repairs are carried out at West Drayton.
The rest of the line is running normally.
No Hammersmith & City line service in east London after trespasser incident
There is no service on the Hammersmith & City line between Barking and Liverpool Street due to a trespasser on the tracks at Stepney Green.
The rest of the line is experiencing severe delays. Tickets are being accepted on London Buses, the Mildmay line, DLR, Elizabeth line, c2c and South Western Railway services via any reasonable routes.
Minor delays on the Bakerloo line
Minor delays are affecting the Bakerloo line while engineers work to fix a points failure at Queen’s Park.
No Piccadilly line service between Acton Town and Uxbridge due to points failure
There is no service on the Piccadilly line between Acton Town and Uxbridge while engineers deal with a points failure at Ealing Broadway.
Services on the rest of the line are running normally, and tickets will be accepted on London Buses.
Temporary traffic lights causing delays on A10 High Road
Temporary traffic signals are in place on A10 High Road (both directions) at the junction with B153 Philip Lane due to ongoing utility works.
Expect some delays in the area.
No District line service between Turnham Green and Ealing Broadway after signal failure
No service is running on the District line between Turnham Green and Ealing Broadway due to a signal failure at Ealing Broadway.
The rest of the line is operating normally, and London Buses are accepting tickets via any reasonable routes.
Severe delays on Elizabeth line stretch during urgent West Drayton repairs
Services are heavily delayed between Hayes & Harlington and Reading as urgent track repairs are carried out at West Drayton.
The remainder of the line is operating a good service.
Minor delays continue on the Central line
The Central line is continuing to face minor delays.
Temporary traffic lights on Waldram Crescent for Thames Water works
Temporary traffic lights are in place on Waldram Crescent at the junction with Perry Vale to allow Thames Water works to take place.
Road blocked on Brixton Road due to broken down bus
A23 Brixton Road is currently blocked in both directions at the junction with A203 Stockwell Park Walk due to a broken down bus.
Please seek alternative routes where possible.