Do you know where the connection was made on the Berger side?
On the recommendation of Wardy, Badlad, Steve Thomas, Alan Box and I looked at the top of the DED Gallery for a possible connection back in 1992 but didn't find anything.
Apologies, I would change the title but a) I don't know how, and b) it would then make your post look a bit odd.
When I first saw the news, for a split second I thought that somehow, with some bizarre dye tracing experiment French cavers had linked Goufrre Berger with the cheese maker's caves of Cheddar!!