That picture looks familiar...
Was it on the (back?) cover of the last SWCC journal?

Cracking shot though! 

Yeh I have seen that too before, it's either Peak cavern or OFD?

it was here

https://ukcaving.com/board/index.php?topic=22965.msg289632#msg289632

Behind that waterfall lies one of the most mysterious and intriguing leads in OFD - the Sandinista Series, one of the few passages on the true left bank of the streamway, heading into blank mountain: an old phreas currently blocked with soft sand some way from the top of a 15m pitch. Unfortunately getting into it requires an awkward squeeze. I found it easy on the way in when I did it a little while ago, but on the way out I caught my rib cage on a projection and cracked a rib. Ouch. For several weeks.

Great issue, has been a while since I found one as interesting as this one...