Mr Blunkett said the dispersal system, introduced under his predecessor Jack Straw, had sparked an "avalanche of criticism". He added: "People said it caused havoc within certain communities." He spoke of a GP surgery in his Sheffield constituency where doctors told him they could not cope because one third of patients spoke no English and required " intensive language interpretation". He said: "That is silly. That's disrupting the community. It causes friction. It is, if you like, the firelighter for the BNP and others who want to cause mayhem."