The 1911 census records for England and Wales have been made public, two years earlier than the 100 year embargo. The returns contain more information than previous years including length of marriage, the number of children in the household, any guests on the night in question and more occupational information. For the first time you can see the actual form your ancestor filled in, complete with crossings out, mistakes and any additional notes not transfered to the official enumerator's summary. You can search them on the 1911 census website.
It's thought that several thousand women boycotted the census in protest at women being denied the vote. Some of these refused to fill in the form but submitted a protest statement, so their presence will be registered although without details. The women who stayed away from home for the night and so evaded the count will not feature at all.