This http://accent.gmu.edu/browse_maps/europe… is a useful website with lots of different English accents. Just click on the flags to listen to them. You can also try BBC London as they has pages on accents where you can listen.
Hope it helps.
I'm very desperate to learn british accent. But i don't know how to,don't know the techniques,prounciations & all. So,how do I get a british accent?
Forvo is a good site to check the pronunciation of individual words - you can choose between British English, American, Australian, Canadian etc (note that not every word has an example from each variant).
Thanks emsr2d2 for that link to forvo. What a wonderful discovery.