Selhurst derailment brings hours of disruption to south London rail lines

Rail passengers across south London faced hours of cancellations and delays after a train derailed at Selhurst depot in Croydon, an incident compounded by a separate signalling fault between Norwood Junction and London Blackfriars, according to [1]. National Rail issued a travel warning covering Gatwick Express, Southern and Thameslink services, saying journeys could take at least 45 minutes longer than usual, with disruption expected to run until the end of the day, according to [1]. The derailment meant multiple trains were unable to leave Selhurst depot, forcing operators to cancel or alter services more widely, according to [1]. The knock-on effects were wide-ranging. Passengers travelling to or from London Bridge were told to expect a significantly reduced service and advised to consider London Victoria instead, according to [1]. Thameslink services via London Bridge were also delayed, while routes including London Bridge to East Grinstead, Brighton to Cambridge, and Bedford to Three Bridges were suspended in both directions until further notice, according to [1]. Trains running between Highbury & Islington and West Croydon faced cancellation, revision or diversion to Crystal Palace, and four stations — Penge West, Anerley, Norwood Junction and West Croydon — were not served at all, according to [1]. Passengers heading to Gatwick Airport or Luton Airport Parkway were told to allow an extra hour to protect flight connections, according to [1]. By the time National Rail's own incident log was updated, the picture had improved. A notice for the New Cross Gate incident states that disruption between New Cross Gate and Crystal Palace/Norwood Junction had ended, following completion of emergency services' work, according to [2]. That update lists the routes that had been affected — London Overground between Highbury & Islington and both Crystal Palace and West Croydon; Southern between London Bridge and Sutton, Caterham, Epsom, Uckfield, Littlehampton and Eastbourne; and Thameslink between Bedford and Three Bridges, East Grinstead, Gatwick Airport and Brighton, between Cambridge and Brighton, and between Peterborough and Horsham — confirming the scale of the earlier disruption, according to [2]. National Rail said tickets would be accepted on some other rail and bus services via reasonable alternative routes at no extra cost for journeys affected, and that passengers experiencing delays may be entitled to compensation, provided they retain their ticket and note details of the journey, according to [1]. The original estate trigger flagged the same reopening notice cited in [2], reporting lines reopened with major disruption expected until 16:45 across the affected Southern, Thameslink and Overground routes. The source material fetched does not independently confirm that specific 16:45 timing, so that detail should be treated as unconfirmed pending further reporting. What is established, across both sources, is that a derailment at Selhurst depot combined with a signalling fault to disrupt a large swathe of south London's rail network through the morning, and that National Rail's own incident channel later marked the disruption as ended once emergency services had finished their work at the scene, according to [1] and [2]. What to watch next: confirmation of the exact time normal services fully resumed, and whether Southern or Thameslink issue any follow-up statement on the cause of the Selhurst derailment.