Second vote for Biff's replacement inserts https://www.customduo.co.uk/Pitlamp-2-tone-Module/ A gift at £55. Add a couple of 18650 cells wired in parallel from a laptop battery, include a 2A Polyfuse and you have a perfectly useable lamp for well under £100.

Yes, well done... That was clearly too obvious! Take it away!

OK... First try at this...

Mare's cave? Pwll Mare?

Little Neath - Canal bypass...?

Met Pete many times when picking up a key for DYO and no matter how early or late, he was always cheerful and interested in what we were doing - usually with some good advice. He was a member of WSG back in the day. RIP Pete. Graham.

This - from the BBC website - note the reporter's name...

Westminster Speleological Group (WSG) formed at Easter 1950...

Whilst not specifically covering the area you refer to in detail, you might be interested in the postulations and surface work carried out by Dr. John Wilcock and members of the WSG between 2000 and 2009. This work is part of a huge summary of similar work across the area from Pant Mawr across...

Go to the end of Hangar passage, up over the ramp, through the choke and into the passages beyond to the right... From my log August 2008..... ...I went back up the climb to the Green Canal and, on the left, almost at the end of the canal, a well-worn opening beckoned. I climbed through into...

Dan yr Ogof - Hangar Passage...

You could do worse than look over some of the photos taken by J. Harry Savory depicting caving on Mendip in the early part of the last century. A man Deep in Mendip, Or the Wessex Publication 'A Pictorial History of Swildon's Hole'.

I packed up diving 20+ years ago but still have some of the kit! Among the pile are 4 x 7 litre steel cylinders - long out of test but free to a good home before they go to scrap. Two are older HOT spec with taper threads and pillar valves fitted. 2640psi. Two are BS5045 with parallel threads...

Considering a trip from Top into Pendulum Passage. Been through from Arete Chamber to Timo's Table recently but remember many years ago going through The Chasm. I'm aware of the pitch at the 'Gnome' end (the survey shows P5 and P3 and a couple of climbs) but what's the situation at the other...

Planning a Far North trip in Danny shortly. Not been much beyond the Rising for some time now so need a memory refresher on the ladder requirements for Birthday Pitch. Tim Stafford says 50' but I seem to remember it being less than that - especially if a long belay is used at the  head. Also...