England riots: PM says 'fightback is under way'

"We needed a fightback and a fightback is under way", the prime minister has said after four days of riots.

Speaking outside Downing street, David Cameron added that every action necessary will be taken to restore order around the country.

On Tuesday night, unrest spread to cities including Manchester, Salford, Liverpool, Nottingham and Birmingham, with shops being looted and set alight.