From BBC News:
More than 50 public figures have added their names to a letter in the Guardian newspaper saying the Pope should not be given the "honour" of a UK state visit.(Thanks to TreVelocita)
Authors Terry Pratchett and Philip Pullman and actor Stephen Fry are among those critical of the Vatican record on birth control, gay rights and abortion.
Other signatories to the letter in the Guardian include: Professor Richard Dawkins, Ken Follett, AC Grayling, Stewart Lee, Claire Rayner, Lord Foulkes, Lord Hughes, Professor Steve Jones, Sir Jonathan Miller, Lord Taverne, Peter Tatchell and Baroness Turner.