Historically, the species was much more abundant on the Great Orme when it was discovered in 1783. The population was reduced in the 19th century by collectors deliberately digging plants up for their gardens, and more recently by overgrazing by sheep, feral goats, and rabbits, and by invasion by seedlings of other species of Cotoneaster arising from cultivated plants in gardens in nearby towns. It has full legal protection under Schedule 8 of the Wildlife and Countryside Act 1981.
So it could well be flourishing in some local gardens