Who played Lavinia in great st trinian's train robbery?

Lavinia in "The Great St. Trinian's Train Robbery" was played by actress Tamsin Egerton. The film, released in 2012, is a sequel to the 2007 film "St. Trinian's" and features a comedic storyline centered around a group of mischievous schoolgirls. Egerton's portrayal adds to the film's charm and humor.