Wow two messages in one day, thank you very much.
I did in fact move forward with my research. The Pennington-Bickford family were connected with the St Clements Dane Charity in Holborn, London (you know the nursery rhyme, oranges and lemons - there is a connection but right now can't remember what in my excitement!). After a long and drawn out process including the National Archives I contacted the Trustees of the charity who in turn advised that the records of the charity were archived in the City of Westminster Archives in London and I made contact with them. However, the records that were available did not include any reference to a children's home in Sussex and that where is I paused thinking what to do next.
The address that I have for the home is taken from the 1911 census and as you say road names change and shift their location. I did contact both of the famility history societies in sussex again unsuccessfully. I assume that the home was a private home but still feel that I can't give up my search, it needs to be parked whilst further thought happens. I will certainly trying posting as you suggest spinalman and see if I can get any response.
Thanks once again for your replies, much appreciated.
Regards