In reply to Alan James - Rockfax:
Clicking on the first two links:
"Approach notes
Just don't bother looking. It's not real"
Although Pylons secret crag says:
"Crag features
This is not a real crag. "
It looks as if some routes are logged.
Perhaps they're all real but the people involved don't want to publicise access.
Post edited at 15:52