Knocklegan standing stone is now no longer standing, collapsed into the hedgerow and overgrown with brambles. I did a quick tidy up and revealed a roughly 2 metre long stone that would have been reasonably impressive when stood up, but now lies forgotten and ignored by the side of a pasture field.
Marked as a bullaun stone on the OS maps, this is a very unlikely candidate for that title. Maybe the hole/bowl is man-made, but I've read elsewhere that it goes right through the stone. It is however revered locally and has a rag tree beside it.