Has this been added before, can't find anything about it? Free search of your surname in the UK, then you have to pay to view the transcrips, non the less, quite interesting.
you can access 1911 free at the National Archives at Kew, Richmond.
All previous census can be accessed for free at the London Metropolitan Archives, Clerkenwell. Or subscribe to www.ancestry.co.uk includes 1881 census for free.