DigitalDJ.co.uk :

4 February 2006

In the UK you may not DJ in public using an mp3 even if you bought the original vinyl record. You need to get a license to permit the copy to be used in a performance setting. DigitalDJ and PPL will sell you this license.

If a copy of a sound recording is made in order to play that sound recording in public, PPL controls the relevant copying rights and so can grant you a licence to ensure that your copies comply with the law. Why do I need an extra licence if I have obtained the tracks lawfully?

When you purchase a vinyl record, tape or CD you only can use that record for domestic purposes. You do not acquire any rights to copy that record or to play that record in public. So if you want to copy a sound recording on that record onto your computer, you must obtain the permission of the owner of the copyright in that sound recording.

http://www.digitaldj.co.uk/paris/digitaldj_home.asp?page=digitaldj_faq.asp