I just ran across your request, some where in my archives I have info. on the owner around 2002. I will try to find it for you. I am the owner of the 1950 Docker Daimler Hooper Earl's Court Auto Show. There was recently a book released "Docker Daimlers,; it forgot to mention mine. Brian Smith's "The Daimler Tradition" didn't forget.
I would be willing to help in anyway with your book, as I know more than most about (Dockers, show cars, Hooper, Osmond Rivers, etc.)