Downing Street is offering a petition for people to sign, which would reduce the census release period from 100 years to 70 years, thus making the 1911, 1921 and 1931 censuses available immediately. If you would like to add your name to the petition, you may do so right now online.
NOTE: You must be a British citizen or resident to sign the petition.
To add your name to the thousands of other genealogists who have also asked, please click on this link: http://petitions.pm.gov.uk/CensusInfoFreed/
My thanks to Brian Curd for letting me know about this e-petition.