This cache-and-dash cache is situated on a fairly muggle free road near Reading School.
If you'd like to know more about the school and it's history, here are some links:
http://www.reading-school.co.uk/
http://en.wikipedia.org/wiki/Reading_School
http://en.wikipedia.org/wiki/Hogwarts
The cache is (fairly) small, but I've labelled it as a micro as it is designed to hold only a logbook. Don't forget to bring your own pen!
Good luck!
P.S. Parking is limited at the G.Z.