The British Academy of Composers and Songwriters represents, informs and champions the rights of music creatives in the UK.
For information about any contemporary classical music or composers, The British Music Information Centre in London is an excellent starting point.
The MCPS (Mechanical Copyright Society) negotiates, protects and administers the copyright in all recorded Production Music libraries' works. A valid licence must be obtained before exploiting any of the works.
The Performing Rights Society administers the performing right in the musical works of composers, songwriters and music publishers performance and broadcast of musical works - and distributes these to its members.