Lesley Walker, ‘Mona Lisa’ and ‘Mamma Mia!’ Film Editor, Dies at 80: Lesley Walker, the BAFTA-winning British film editor who worked on films including “Mona Lisa” and “Mamma Mia!,” died on Dec. 2. She was 80. Walker began her career as an… #LesleyWalker #FilmEditor #MonaLisa #MammaMia #BAFTA