Filming in Ireland during the spring and summer is always tricky because the weather can change in a few minutes. The cricket scene was especially hard to shoot; the light was different in almost every shot.
Anna Maxwell Martin also played Elizabeth Darcy, the former Elizabeth Bennet, in the television production of Death Comes to Pemberley (2013), based on the novel by P.D. James, a murder mystery sequel to "Pride and Prejudice".
The white muslin frock with red patterned overdress worn by Eleanor Methven, as Mrs. Lefroy, is the same one Brenda Blethyn, as Mrs. Bennet, wears in Pride & Prejudice (2005), in the Meryton scene when the Bennets learn that Mr. Bingley has returned to Netherfield Hall.
The pink patterned muslin gown Anna Maxwell Martin (Cassandra Austen) wears during the engagement party scene, is the same gown worn by Carey Mulligan (Kitty Bennet) in Pride & Prejudice (2005). Mulligan wears it during the scene in which the younger Bennet sisters visit Netherfield Hall to check on the progress of Jane Bennet, who is ill.
The white overdress with pink and green stripes Jessica Ashworth (Lucy Lefroy) wears to the Laverton Fair, is the same costume worn by Carey Mulligan (Isabella Thorpe) when she first meets Catherine Morland in Northanger Abbey (2007).
The trivia items below may give away important plot points.
Unfortunately, for a biographical picture, a great deal of the story is imagined. In fact, most biographers believe that Jane Austen only knew Tom LeFroy for approximately a month, from late 1795 to mid- to late-January of 1796, and that although they did spend a great deal of time together during this period, marriage between them was known to be untenable, and that upon realizing the extent of their friendship, Tom was sent away before the end of January, 1796. They are not believed to have ever seen each other again, although Tom did name his eldest daughter Jane, and admitted in his later years to a nephew that he had indeed loved Jane, but that it was in a very "young and boyish way" (being approximately twenty years old at the time). Jane stayed so close to her family, that she had a very small social life, as did most unmarried women, including her sister, and she therefore most likely replayed this heady month in her mind many times over the course of her life - using it as really her only truly romantic experience on which to draw.
Jane and her sister both survived a childhood bout with typhoid, which can have a later recurrence similar to Shingles. This is one of the many theories concerning her death at 41. Jane's sister, Cassandra, who also remained unmarried, destroyed most of Jane's correspondence upon her death - leaving many biographers with a lack of information to rely upon. Aside from writing, Jane also lived a very quiet life within her family - sewing, attending church, and occasionally dancing, which she loved. This likely also limits the amount of information left for biographers to study, although her brief friendship with Tom Lefroy and her single-night engagement to Mr. Bigg-Wither appear to truly be the extent of her romantic adventures.
The first dance in the second ballroom scene is done to the tune of "Hole in The Wall". It is a period dance now done as a staple among members of The Society for Creative Anachronism (a medieval and early modern recreation orhanization) and stealing a partner, as LeFroy does with Jane, is a twist to the dance.