Sevenoaks railway accident

The Sevenoaks railway accident occurred on 24 August 1927 between Dunton Green railway station and Sevenoaks railway station. The Southern Railway's afternoon express from Cannon Street to Deal left London at 5pm, hauled by River Class tank engine No 800 River Cray. Several passengers later recounted that from time to time the train seemed to roll excessively on fast curves. As it passed through Pollhill Tunnel at 60 mph the rocking became violent and the train derailed past Dunton Green railway station. Unfortunately, the line at that point is in a cutting which is spanned by a bridge carrying Shoreham Lane. The cab of the locomotive struck the bridge and the engine was turned on its side across the cutting. The leading coaches piled up against it, killing 13 and injuring many more. Railway engineer Brigadier-General Archibald Jack was a survivor of the crash.

John Wallace Pringle, Chief Inspecting Officer of Her Majesty's Railway Inspectorate conducted the inquiry in person.
Following the accident, the Southern Railway withdrew all the remaining 'River' class tank engines, which caused a public sensation at the time. Other drivers testified about the instability of the class and it emerged that one locomotive had previously derailed at speed, though it had miraculously re-railed itself. The engines' high centre of gravity, their hard springing, and the tendency for the water in the side tanks to surge, all caused the engines to roll dangerously at speed, so much so that in this accident the nearside wheels had lifted.

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