What we know so far on train derailment near Lewes

Here's what we know so far.

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• According to reports from emergency services, the incident occurred shortly before 4pm. British Transport Police (BTP) said they received reports of a derailed train at 3:54pm, while East Sussex Fire and Rescue confirmed they had been called at 3:55pm.
• The train was a Southern service travelling from London Victoria to Eastbourne
• There was a huge emergency response, with more than 50 vehicles reportedly attending the scene, including multiple helicopters
• BTP later issued a statement saying that a major incident had been declared
• Images from the scene showed three train carriages lying on their side, having come off the track and down an embankment
• Images also showed what appeared to be a heavily buckled track
• BTP confirmed that two people had been serious injured, with nine others also sustaining injuries
• A number of passengers onboard have described the terrifying experience
• The incident caused widespread disruption across the rest of the rail network, which is ongoing and expected to continue overnight and into tomorrow

This page will be updated as we learn more.