The Bedford to Northampton Line was a branch of the Midland Railway which served stations in three counties: Northampton and Horton in Northamptonshire; Olney in Buckinghamshire; Turvey and Bedford in Bedfordshire. The trackbed was used by the Stevington & Turvey Light Railway till Summer 2014. Some photos can be found at https://www.flickr.com/photos/crowquine/sets/72157645542592774/
Increasingly, the remains of the narrow gauge line are being cleared. The lever frame for signals and points has been one such casualty - a shame since the cache was located inside the metal lever frame!. However, since I like the location, I have replaced the cache nearby.
The cache is now a camo sample pot. To get to GZ, you no longer need to go through the green gate (see waypoint). Watch out for highland cattle and llamas!
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Congratulations to caesersghost on being First To Find before publication and Wismill on being First To Find after publication.