U.K. finance minister Rachel Reeves has called on the Competition and Markets Authority (CMA), the U.K.'s principal competition regulator, to investigate private dental fees amid concerns over high costs and a lack of transparency. A recent study found that private dental costs have risen significantly, with some treatments increasing by over 30%. Reeves said: "The scourge of hidden costs . . . has blighted families in need of dental treatment for too long."