Hi Emma This is the limited info that I have. May Ann Dunkley was the daughter of William Henry Senior, she was born in the late 1890's. My Dad her eldest was born in 1921. I am not sure how large the family was that descended from William Henry ( the carriage manufacturer). I know of William Henry jr ( who ran the business til the 2nd world war), Percy, May and 2 sisters Dora and Alice. I have a picture that suggests that there may have been many children, but my Aunt doesn't know who they are.
I believed that you would know Ian, as he is William Henry's (jr) son .. perhaps you could email me so we can continue this in more detail. JAne