LONDON (AFP) - The head of the BBC said Tuesday that the scandal over alleged abuse by late star Jimmy Savile is “a very grave matter” that will affect the organisation’s reputation for trust and integrity. Director General George Entwistle, facing tough questioning from British lawmakers, said the BBC was doing everything in its power to find out how Savile was apparently able to carry out widespread abuse. But he denied that the world’s biggest public broadcaster put pressure on the flagship current affairs television show “Newsnight” to drop an investigation into the abuse claims late last year. “There is no question in my mind this is a very grave matter indeed,” Entwistle told parliament’s Culture, Media and Sport body.