Is that the one that was on the TV Mod Ant? Seem to remember Cope talking with Jo May on it, or rather 'in' it.
Just read a book called simply Fogou by Jo May which I picked up for a couple of quid at Glasto - there was a great book tent there. A nice and interesting enough read though I found all the CAER related stuff a bit cheesy.
Shame to see on here they act like gits when people wanna see the fougou. Tsk!