LONDON — British actor Richard Griffiths, best known for his roles in Harry Potter and the cult film “Withnail & I”, has died aged 65, his agent said on Friday. The portly star of stage and screen, one of Britain's best loved character actors, died on Thursday from complications following heart surgery, his agent Simon Beresford said. Griffiths will be forever remembered by fans of cult classic “Withnail & I” as the amorous Uncle Monty, although he reached his biggest audience as Uncle Vernon Dursley in the Harry Potter films. — AP