Hi all. Thanks so much for the help. Hopefully the following will help give some more identification.
The Plate on the mower says
Mower no. 40 07329
There is a stamped number on the engine at the front base.
The number is in 2 parts and the first part is a little hard to read. The best I can come up with is the following.
2105(v or x or y) then 26566
