Statewatch has posted a copy of a bill to introduce the U.K.'s version of a national ID card:
UK: Identity Card Bill published 25 May 2005 (full-text, pdf):
http://www.statewatch.org/news/2005/may/uk-ID-CARD-Bill.pdf
Explanatory Notes (pdf):
http://www.statewatch.org/news/2005/may/uk-ID-CARD-Bill-expl.pdf