Hi LarkSpur,
Apologies that makes sense now

Yes that does seem to be the correct Henry... Although it isn't as straight toward as that. I'll try to briefly explain but this is probably something for a new thread.
The story passed down:
My great grandfather told my grandfather, my grandfathers brothers, my father and all the family this...
He was born Henry Munday in Somerset 1892 (52 Bath Road to be exact). He was always know as 'Harry'. I'll refer to him as 'Harry' going forward.
Harry told the family that when he was younger, his father was a gambler and lost a lot of money on a ship returning from India where he was working - he planned on buying a large store when he got back to Blighty but because of the money he lost could only afford a small tobacconist in Walthamstow.
Because of his father, Harry ran away from home and lived with gypsys - he was so fond of them that he took their surname (Webb) and also married a gypsy girl (Alice Stone - my great grandmother).
Harry had a younger brother named Sid (again a nickname - my uncle told me his real name was Cyril but I now believe it was Cecil from the documents I found). Harry stayed in contact with Sid after he ran away from home but none of the other family. We also know Sid had a twin sister but that's about it.
Up until a few weeks ago this was the story that the family knew of Harry - no idea who his parents or other family were, literally nothing and it's always been accepted that we would never know.
Then a friend of mine started helping me do some digging. This is what we have found...
Please see the attachments - the first two from 1901 - shows Henry Munday and wife Martha at the bottom of the first page and their son Harry at the top of the second page. The next is the 1911 census showing his brothers and sisters including 'Uncle Sid' and Sid's twin sister 'Edith'. But no Harry? Why... Well it matches up with the story that he ran away from home... All well and good.
The next problem is Harry's marriage certificate to Alice.
Notice he has put his name as Henry Morris? There was a rumour he picked up Morris from a doctor that looked after him when he first ran away from home but no evidence of that - he has also put Henry Morris as his fathers name.
Witnesses: Arthur and Phoebe Webb (no mark - they were illiterate = gypsys? That's the story). Where as Harry did have an educated hand. We have also come to the conclusion that Harry actually added Webb to his surname at a later date too. Why? Who knows...
Sorry for the MASSIVE explanation and there is probably more I've missed - as I said I should really start a new thread!!
Thanks for reading,
Joel.