Gatepost garden

Under that wonderfully bright green moss there is the rounded red sandstone top of a stone gatepost. It stands at the western entrance to the once formal garden in Benmore Gardens, and has gradually disappeared over the years until now, when it is the base for a garden in miniature. I don't know what these lovely little red flowers are; they are threaded, as it were, through several shrubs and bushes at this point in the garden and I'd love to have some growing in my patch.