This is one of a series of increasingly tenuous, easy caches celebrating Rickmansworth's musical connections.
Apparently the half-sister of Geri Halliwell, Ginger Spice, used to live around here. Geri grew up in Watford, but presumably popped round here sometimes. The Spice Girls were reponsible for such hits as... oh, you know.
Magnetic nano - you will need a pen. There's nearby parking.