Daniel Astaire, Westminster's cabinet member for community protection, said: "It is deeply unpleasant for visitors and shoppers to be harangued by a plethora of collectors who often resort to aggressive tactics as they vie with one another to pounce on passers-by. It's no coincidence this has led to the phrase 'chugging', as people do feel as if they're being mugged. Apart from turning a walk down Oxford Street into something of an obstacle course, it must also harm the reputation of those organisations in whose name such tactics are carried out.