Thanks very much for that information.
On Walter Sidney RICHARDS' (my Great-Grandfather) birth certificate it listed his father, Alfred George, as a gardener; from what I can piece together, but are unsure, it seems that at some stage an Alfred G RICHARDS worked as a gardener at a cottage in Nitton. See link below, down the page about halfway.
http://www.rockcottageniton.co.uk/information/history-2/

Going from this information the Alfred father here had a son Walter (16 - carriage driver) which makes me wonder whether this was Walter Sidney RICHARDS and the family had moved there after living in Isle of Wight or whether this Walter is an uncle to the Walter Sidney (that is my Great-Grandfather), and the father Alfred is in fact Walter Sidney's Grandfather (my Great-Great-Great-Grandfather?

The Walter Sidney RICHARDS, that is my Great-Grandfather birth certificate states the following information:
Registration District: Isle of Wight; 1900 BIRTH in the Sub-district of Godshill in the ______?____ of Isle of Wight.
When and where born: 21st April 1900, "Sunnyside" Bonchurch R.D.
Name: Walter Sidney
Sex: Boy
Name, Surname of Father: Alfred George Richards
Name, Surname and maiden surname of Mother: Lena Richards formerly Croad
Occupation of Father: Gardener (Domestic)
Signature, description and residence of informant: A. G. Richards, Father, "Sunnyside" Bonchurch
When Registered:30th May 1900
Signature of registrar: Thomas ? Registrar

I will put this into my journal comments as well and maybe this information will prompt others to come forward with their knowledge.