The National Archives has announced that in collaboration with family history website findmypast.com, the 1911 census will be available for free at a limited number of archives in England and Wales.
Birmingham Archives & Heritage
Devon Record Office (Exeter)
Norfolk Record Office
Tyne and Wear Archives
The National Library of Wales (Aberystwyth)
Manchester Archives and Local Studies and Greater Manchester County Record Office
Sadly, the Essex Record Office is not included at the moment.
Alternatively, information on the pay-per-view site can be found on Find My Past 1911.