Bit late with this but on 27th March 2011 I completed the 2011 census return and posted it the following day. There was a big difference in the amount of information we had to enter and the information that was gathered 100 years ago.
In the 1911 census a large number of women boycotted the census by refusing to be counted. They did this as they were frustrated by the government's refusal to grant women the vote. I wonder how many people this year will not complete it and what their reasons are.
Makes you wonder how big the form will be in another hundred years!