Thanks for the tip about the fische but I do not have access to a reader, unfortunately I am mostly housebound except for the odd visit to family or on a very good day to the shop lol.
The Harvey part.....I started with my mum, Harveywells and traced backwards. Once I stopped finding Harveywells the name became Harvey with no mention of the Wells (My G G Grandfathers birth certificate has a note on the side to say that although written as Harvey the name should be read Harveywells) and so on until I reach Henry James Harvey/Wells. His marriage certificate is in the name Wells (although recorded as Wills just to complicate matters), that is the only documentation with Wells (not part of Harveywells) I have found and it is definitely the right marriage. On the certificate though there is no mention of Harvey. And as I said before on the census he is recorded as James Harvey (which further complicated matters when trying to find him) until I found the christening records and birth certificate of three children stating his name as Henry Harvey and Henry James Harvey.
I have to say the only considerate thing (from a family history perspective lol) my Gx4 Grandfather did was marry a woman with an unusual-ish name which allowed me to find their marriage and childrens records.
I am sure I will eventually get to the bottom of it all, I have only been researching for a month, it is just frustrating that really I have no clear lead on him. The thought had crossed my mind that he was possibly a very early identity theft fraudster and that the entire saga with the surname was a result of him trying to hide his real identity lol!!!

Thanks for your help, I do appreciate it and I have been looking at the census returns trying to find an answer, but none have presented themselves as yet.
Cheers again
Erika