by Claudine Zap Barney Rubble! The cockney accent is on its way out? Can't be, guv'nor! A British professor (not Henry Higgens ) has proclaimed that the accent of the East End is leaving. Gone in 30 years, finds a study. Blimey. The dialect made famous by " My Fair Lady " is out. What's in: "Jafaican," according to a story on the BBC . Not to worry. Cockney hasn't gone far, it's just moved from the capital to places further afield, where we're told,