English: Old Dalby railway test centre
The right hand track is equipped with 3rd and 4th conductor rails to enable testing of London Transport underground stock.
This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Alan Murray-Rust and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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