[Wyota]

Thanks for the replies, I'll check them out.  Yeah, don't expect, nor really want the ginnie springs type stuff.  When I say cavern dive at home, twas about 10 feet wide to the "keyhole" of the spring, still in light zone, to get past there, same thing, you have to remove BCD and shove it through the keyhole, and follow it.  Thats the kind of exploration Im interested in.  Again, thanks for the tips, I'll check em out.

PS  good to finally be back in the UK