Take a walk along the former railway line, now part of the Cambridgeshire guided busway leading to/from Cambridge North station.
Please replace the cache container exactly as found.
This might not be one to attempt during commuter hours.
Congratulations to ncambray for the first to find, around 15 hours after it was published.
Anyone who correctly guesses the meaning of the cache name is entitled to a virtual pat on the back and a small sense of satisfaction.