In Anne Hathaway's Jane Austen Nightmare at Askmen.com, Anne Hathaway describes a harrowing time during the Becoming Jane movie shoot. Bitter cold weather, and the pressure to "become" Jane and speak with a British accent took their toll. She had to return after the movie was shot to dub her voice because she was unable to consistently hold her accent during filming. The second interview from Brit.film discusses the movie with James McAvoy, as well as Julian Jarrold & Robert Bernstein.
It is interesting to get a take on the film from the stars, as well as the film's producer and director. The interviews are dated, but well worth the read.