I've been following this, plus similar works in the Hemel Hempstead area, for some time - the consultant I was working for at Combe Down was bidding for them, but eventually it all seemed to be taking too long and to be too subdivided and I stopped paying attention.
interesting stuff, though
''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.