Simon Taylor has raised a parliamentary petition about photographer's rights.
There are a number of moves promoting the requirement of 'ID' cards to allow photographers to operate in a public place.
It is a fundamental right of a UK citizen to use a camera in a public place, indeed there is no right to privacy when in a public place.
These moves have developed from paranoia and only promote suspicion towards genuine people following their hobby or profession.
His full article can read on http://www.phooto.co.uk/rights.shtml and the petition accessed at http://petitions.pm.gov.uk/Photography/
A PDF file "A Short Guide to Photographer's Rights in the UK" can be downloaded from http://www.sirimo.co.uk/ukpr.php
There is a very interesting set of comments at a page on the Lochwinnoch Village Forum; last word going to the photographer who remarks
For clarification I should point out that under UK law, there are no restrictions on taking photographs in a public place or on photography of individuals, whether they are adults or minors. There is no right to privacy in a public place, although photographers are of course subject to the usual libel laws in the same way as any other citizen and should observe them. Equipment or film may not be confiscated, or images deleted by any person or officer unless a warrant for such action is issued. Any attempt without a warrant is considered assault under UK law.