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| A C69/77 stock train converted to be a Rail Adhesion Train (RAT) on the Metropolitan line. |
Every now and again I see these Rail Adhesion Trains, usually in the Autumn/Winter months and usually at Watford Metropolitan line station, but I never understood what they did.
Coming back from London, last Sunday evening, a Rail Adhesion Train was in the sidings, so I took a photograph and decided to do so some research to find out what this train actually does.
