Although it was banned in 2003, and penalties were enhanced in 2004, there has not yet been a prosecution, though the practice continues. "Female circumcision a problem in Britain," by D'Arcy Doran for the Associated Press:

LONDON - Female genital mutilation, commonly associated with parts of Africa and the Middle East, is becoming a growing problem in Britain despite efforts to stamp it out. London's Metropolitan Police, Britain's largest police force, hopes a campaign beginning on Wednesday will highlight that the practice is a crime here.