Taphrina deformans is a fungal pathogen that causes Peach leaf curl. I don't recall seeing this striking gall-former previously and was quite struck by its appearance in a garden in Horton today. There are very few Welsh records on the NBN, which does not mean it's not elsewhere of course, but if you have seen this gall former locally I'd be interested to hear. The hosts are said to include Peach Prunus persica and Almond P. amygdalus, so I guess any fruit-growers out there will know more about how frequent this species is locally?
Thanks to Jack for letting us into his parent's wonderful garden.