There is an old hawthorn hedgerow beyond the blast shelter in the quarry and it is covered with lichen. I will happily leave identification of lichen to others, but there is a rather beautiful insect that lives in lichen growing on old hawthorn. It is one of the Lacebugs but is much darker than the frequently seen spear-thistle lacebug, it is a very narrow species and is only 3mm long … but is definitely worth seeking out. If you should find it, you will be looking at Physatocheila dumetorum.