Hi Heywood
On the wedding certificate James A Yeadons father is called Albert.
Hmmmm the marriage in 1906 could be him - he was born (if the Leeds birth info is the correct record) in 1884. Might that be why they married in a registry office - it states bachelor on the certificate so if he had been married before would it have said widowed or divorced.
I'm a little confused as you say the indexes for 1911 also have a James Arthur living in Bramley with Albert - did you mean the 1911 census shows this? If so that is definately him, as he did live in Bramley (called his son Eric 'Bramley' Yeadon) and his father was Albert, therefore I wonder if he married in 1906 and Margaret whoever she was died, or they divorced, separated and he returned back to live with Albert before remarrying in 1911!
Oh these music hall artistes - what colourful lives they lead!! You wouldn't believe the mysteries I have come across with my great grandparents, James and Elizabeth! I hope he was widowed/divorced - he separated eventually from Elizabeth but I dont think they ever divorced - not sure as I dont know how/where to search divorce records