The dynamic and momentum is coming from Afro-Caribbean groups. They have been joined by some (white) chav gangs -- opportunistic thieves. But take the Afro-Caribbeans out of the picture and the underclass whites will slink back into the shadows. And for chrissake, post better sources than the one above.
Why has there been none of this in the underbelly of Essex -- roughly from the outskirts of East London to Southend-on-Sea? These towns -- Grays, Tilbury, Purfleet, Benfleet -- are all poor and deprived. But they're majority white. Face the facts.