By Sarah Mills LONDON (Reuters) – A musical version of childhood classic “Matilda” opened the London Film Festival on Wednesday, with actors Emma Thompson and Lashana Lynch the first of many stars expected to walk the event’s red carpets over the next 12 days. The movie, called “Roald Dahl’s Matilda the Musical”, is an adaptation of the London West End and Broadway stage show based on Roald Dahl’s 1988 book about a young girl who discovers she has a special power while dealing with cruel parents and nasty headmistress Miss Trunchbull. “No Time to Die” actress Lynch swaps her 007 action stunts …