Dressed, went for my walk, stood and watched some larks and came home. Am most impressed with your research skills, but sadly none of the ones shown match the plant, as far as I can see. They seem to be all fully double and I would describe this one as being semi-double.
I grow a fair number, but I am sure this one was bought, either at a G/C or a Show and sold just as P. auricula. All the others I have are properly named.
Thank you again for you efforts.