That's John Pitt in the foreground. And possibly Ian Baillie (in black with his back to us) in the far background, down this far South from Scotland after practically ages.
This is presumably a very metaphysical discussion that has these two guys totally engrossed. Like fishing. Or the price of petrol.
Just maybe they're actually going over specs of a newly commissioned pot?
They would never be - dare I say - just gossiping, right?