I have been able to find out the Wally Warneford was a one time racer from Australia who produced a variety of products which included a two piece Alloy Cylinder Head for the original side valve Morris Minor in the 1950's. I have no information or details on it so if anyone has any imformation it would be very useful, or any of the items he produced.
So far all I have come across so far is an inlet manifold as shown below.