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© David Jones/PA Wire
MP for Stratford on Avon Nadhim Zahawi is on a visit to Kurdistan in northern Iraq
Iraq-born Tory MP Nadhim Zahawi has said that local leaders in northern Iraq estimate that between 500 and 700 Britons are fighting with the Islamist militants.

He told Channel 4 News that he was seeking further information after a high-ranking official told him one had been found "with a Liverpool Football Club membership card" and another carrying a different UK-related membership card.