Who better to advise than the OFCOM (the Office of Communications): the independent regulator and competition authority for the UK communications industries, with responsibilities across television, radio, telecommunications and wireless communications services.
The Radio Society of Great Britain's site contains much of interest to all radio amateurs, including a transcript of the weekly News Bulletins, licensing matters, and so on.
RAYNET have their Home Page on Internet.
RADIO AMATEUR INVALID & BLIND CLUB (RAIBC) are on the Web.
The ARRL (American Radio Relay League) are to be found on the Internet as are the DARC (the Deutsche Amateur Radio Club).
If you plan foreign holidays with amateur radio perhaps you should also go to The CEPT Amateur Radio Club pages for information.