There are as many, if not more regional accents in the UK than there are in the US. The history of the English language is quite interesting once you start to dig, and you learn that the English are not as pure-blooded as they like to make out.
Speech Accent Archive - Audio examples of different English accents worldwide. (For England, click on “english” in the left column. Requires Quicktime plugin.)
Eviews Interviews on the Net A library of interviews classified by region.
University College London, Professor Wells Course guide to English accents - An in depth course about English accents, if you want to dig deeper. (pdf files)