You can get a Blackberry on contract for £15 or possibly as another poster said, £10. But to have a contract phone you have to have a credit history. A member of the so-called underclass (for want of a better word) is very unlikely to get that.
Having been around in the days of the last Tory government, that of Mrs Thatcher, having seen the cuts and the erosion of ordinary working people's ability to live comfortably (having to worry about the price of fuel, food, energy) it was predicted that riots and civil unrest would follow. They did - Brixton, Toxteth etc etc. I have predicted that it would happen again, and now it has. People can only tolerate a government treating them like sh*t for so long.
Or we could go down the route of blaming greed and a sense of entitlement.
Last time in 1981 Thatcher got us into a war roused national pride protecting the Falklands, leading people to believe that we were going to war to protect British people (less than 100 of them or something, and a bunch of sheep), not oil interests, oh no. We are now sending boys the same age as the rioters to Afghanistan but the sense of national pride is not there to dissuade us from rioting as no-one knows why the British Army is in Afghanistan anyway.
Now if this was one of those totalitarian regimes (where the British Establishment congratulates citizens who rise up against their governments incidentally) you can bet that with so much proof of rioting and looting being organised on social networking sites that those sites would be closed down or mobile phone/wireless internet jamming equipment brought in PDQ.