The Teynham 10 is a walk of 5 miles and should take around 2-3 hours depending on find speed. Number 13 should be given the maximum level of stealth and is the meanest seeing as it's no 13!
On the website linked above you will need to navigate to find out some information about the Commemorative Pump.
To locate the cache you will need to answer the following questions...
1. The estimated cost for the pump? = £ ABC
2. The year refurbishments were carried out to the front and a time capsule was added? = DEFG
3. The time in 2008 that it was damaged by a car? H:JKam
The cache can be found at...
N 51 (A) (F) . (H+J) (G+C) (E-H)
E 0 (D+J) (E-D) . (C+D) (B+E) (A+K)
Congrats to SAS&A1 on the FTF of the entire series, and special thanks to them also for all their help in the snagging of these puzzles.