Gambon was invested by Prince Charles as a Knight Bachelor on 17 July 1998 for services to drama ( Queen Elizabeth II 's approval for the award was notified in the 1998 New Year Honours List ) and his wife thus became Lady Gambon . Gambon was invested by Prince Charles as a Knight Bachelor on 17 July 1998 for `` services to drama '' . ( Queen Elizabeth II 's approval for the award was notified in the 1998 New Year Honours List . )