LONDON - British Prime Minister David Cameron, under attack over his leadership during the rioting and looting that swept English cities this week, has enlisted U..street crime expert William Bratton to advise the government on handling gang violence. "I'm being hired by the British government to consult with them on the issue of gangs, gang violence and gang intervention from the American experience and to offer some advice and counsel on their experience," Bratton told Reuters in New York. British police flooded the streets again on Friday night to ensure weekend drinking does not reignite the rioting that shocked Britons and sullied the country's image a year before it hosts the Olympic Games.