« Reply #2 on: Saturday 07 May 11 11:46 BST (UK) »
You can search the 1911 census free. You can't look at the transcription or the original census page without paying, but you might be able to get a shortlist of candidates for your man and then buy a few credits to get further information.
I know the 1911 census is free to view at The National Archives and it might be available at other archives too.
Chowns in Buckinghamshire
Broad, Eplett & Pope in St Ervan/St Columb Major, Cornwall
Browning & Moore in Cambridge, St Andrew the Less
Emms, Mealing & Purvey in Cotswolds, Gloucestershire
Barnes, Dunt, Gray, Massingham in Norfolk
Higho in London
Matthews & Nash in Whichford, Warwickshire
Smoothy, Willsher in Coggeshall & Chelmsford, Essex