Due to a tight budget the director had them film all the sex scenes on one day.
The waltz played towards the final scenes is 'Invitation to the Dance' by Carl Von Weber which was composed as a piano piece in 1819 and as an orchestration in 1841 by Hector Berlioz after Von Weber's death. Waltz music and dance was considered scandalous in its early days and only became fashionable in the 19th century. This is one of the earliest waltz compositions.
The red riding habit with the black and white trimmings that Natalie Dormer wears as Lady Worsley is as closely as possible identical to the one the real Lady Worsley is shown wearing in the portrait of her painted by Joshua Reynolds in 1775. It was based on the uniform of her husband's regiment, and the original is now kept at Harewood House.
Takes place in the 18th century