The pictures, which were taken on Friday, August 14, show British Transport Police (BTP) vehicles, Network Rail vehicles and RAIB vehicles near the derailed carriages.
A major incident was declared after three carriages of a train derailed onto their side on Thursday afternoon (August 13) at about 3.45pm.
The incident left many people trapped and the the ambulance service confirmed that 20 people were taken to hospital, including two who were seriously injured.
RAIB has said it is conducting ‘a full, independent safety investigation’ into the incident.
1. Train derailment near Lewes
Police, Network Rail and the Rail Accident Investigation Branch at the site of the train derailment on Friday, August 14. Photo: Eddie Mitchell Photo: Eddie Mitchell
2. Train derailment near Lewes
Police, Network Rail and the Rail Accident Investigation Branch at the site of the train derailment on Friday, August 14. Photo: Eddie Mitchell Photo: Eddie Mitchell
3. Train derailment near Lewes
Police, Network Rail and the Rail Accident Investigation Branch at the site of the train derailment on Friday, August 14. Photo: Eddie Mitchell Photo: Eddie Mitchell
4. Train derailment near Lewes
Police, Network Rail and the Rail Accident Investigation Branch at the site of the train derailment on Friday, August 14. Photo: Eddie Mitchell Photo: Eddie Mitchell