Sad news, I'm afraid...Denis passed away back in May.
I last had contact with him just after Christmas and had been trying to get in touch myself, as I will shortly be visiting his area. I was given the information today after contacting another mutual acquaintance (who does not visit this board). He also mentioned that Denis' executors were supposed to inform all of Denis' contacts, but appear to have only reached about 25o/o that he knows of!