McAdam, A D, and Clarkson, E N K, 1986 Lothian Geology / an excursion guide. Edinburgh Geological Society. 208 The limestones of the Bathgate Hills have been extensively worked in the past for agricultural use both by quarrying and mining. 216 Hillhouse Quarry and Mine. Park at Beecraig Visitors? Centre (006 746). The strata dip west at 30-40? and consequently the stoop and room workings north of the road, which are still open, slope very steeply underground. There have been roof collapses in recent years, some of which have caused subsidence in the overlying road.[/i]
Thanks Langcliffe, this is the cave/mine in question. Would be grateful if anyone else has additional info or has also visited recently (I was there yest)?