SK53
Further down Rhes Penglas / Penglas Terrace as seen on Bing Streetside (and therefore usable). It will apply solely to the single terrace and I'd expect housenumbers to be distinct from those on Fford Penglas / Penglas Road.

Link: https://www.bing.com/maps/streetside/?&cp=52.416087~-4.077647&lvl=17&dir=46.145&style=x&q=