Dub Pistols with Terry Hall at Electric Picnic

Terry Hall is doing what Electric Picnic are calling Hip Hop with Dub Pistols, and they'll be on the new stage at EP called 'the Nokia Trend Lab'. I wish someone would explain to me what Dub is. I assume listening to the Dub Pistols that it's reggae/ska meets hip hop. Anyone care to educate me?

Anyway you might know Terry Hall singer with the Specials. I hadn't heard of Dub Pistols before but they seem pretty damn good. EP line up just gets better and better.