article: Slam-door train
links: British Rail Class 423 British Rail Class 312 The Railway Magazine South Eastern Trains British Rail Mark 3 British Rail Class 415 British Rail Class 305 British Rail Class 421 British Rail Class 302 British Rail Class 308 Preservation British Rail Class 307 British Rail Class 411 British Rail Class 309 British Rail Class 304 British Rail Class 310 South West Trains