British city turned to hell by crack cocaine, fentynyl and brick-dust heroin so dirty addicts have their limbs chopped off. Deaths are soaring and syringes litter the streets. No wonder users boast to GRAHAM GRANT: 'The police don't bother us'

Bleak scenes are played out every day in the centre of this city, where a world of addiction and despair exists alongside the shoppers, tourists and office workers on their lunch breaks.