Thanks for all the help i am going to start looking in to all these possibilities, one thing that has me worried though is the ones found for 1826! I know sometimes census's can be a year or two out but this seems like such a large gap and all census's 1881 onwards have him as 1833 and his marriage in 1873 has him as 40 years old!?
I did assume that at this age of marriage the likelihood was he had been married previously.
And in regards to the last comment on an Ada Beckwith and husband having a John Nicholson (brother) living there, i have the 1881 census for John living with his "2nd" wife and children, however what makes this curious is my Great Grandfather (son of John) is John Beckwith Nicholson!
Also i forgot to mention i cannot find the 1891 census for him, i have his family (wife and children) but hes not there, then he reappears again in 1901 census