The scene of Col. Brandon shooting with Sir John Middleton was not in Andrew Davies's script. It was added at the suggestion of Mark Williams (Sir John), who was keen to include a scene between the two men, and being a historical gun enthusiast, wanted an opportunity to showcase his expertise.
David Morrissey is about 16 years older than Charity Wakefield, which is roughly the same age difference as their characters Colonel Brandon and Marianne Dashwood in the novel.
The scene in the carriage of the Dashwood ladies on their return to Barton from Cleveland was actually shot as a scene of Marianne and Elinor on their way to Cleveland from London. During post production, it was felt that the scene would fit better after Marianne's self-discovery that takes place following her illness at Cleveland, so it was moved. The shot of Mrs. Dashwood in the carriage is actually from an earlier scene. Note that the upholstery in the close-up of Mrs. Dashwood is different from the upholstery in the close-ups of Elinor and Marianne.
Script writer Andrew Davies modeled the character of chubby, over-indulged Harry Dashwood, son of John and Fanny, after the character Eric Cartman in the animated series South Park (1997). Davies wanted to portray Harry eating "cheesy-poofs" in every scene. (Fruit crisps were substituted for cheesy-poofs.)
Elinor is 19 years old, Marianne is 17 years old and Margaret(Meg) is 13 years old,