Once upon a time The Doctor lived nearby in the big blue building (it's bigger than it looks from the outside). Many Geocachers trekked to see this Doctor Who Experience and visited this cache but after several years The Doctor was forced to relocate The Experience to the Doctor's home some 84 billion miles west down the M4 in Gallifrey.
The Doctor has recently undergone a re-generation and so it is fitting that this cache has also been regenerated, this time in a smaller more beautiful form.
There is paid-for parking, but you could do a quick dash 'n' cache to get it.