Thanks for the great information guys,I will just put a couple of links in relating to HGP mowers.Click Here and here

I was looking at the HGP with the Simplex motor and could not find much on Hardman and Hall so I found a Patent with their full names.

Cheers Max.

Attachments
Hardman & Hall Simplex.jpg (54.63 KB, 100 downloads)
Hardman & Hall Simplex 1.jpg (180.02 KB, 100 downloads)
Hardman & Hall Simplex 2.jpg (287.89 KB, 99 downloads)
Hardman & Hall Simplex 3.jpg (81.19 KB, 100 downloads)
Hardman & Hall Simplex 4.jpg (107.33 KB, 98 downloads)