Glenda Jackson (Nina) and Andrew Faulds (Davidov) would later serve together as Labour Party MPs in the British House of Commons from 1992 to 1997. Jackson was the MP for Hampstead & Highgate from 1992 to 2010 and for Hampstead & Kilburn from 2010 to 2015 whereas Faulds was the MP for Smetwick from 1966 to February 1974 and for Warley East from February 1974 to 1997.
The extras playing (miming) the orchestra in the scene featuring Pyotr Ilyich Tchaikovsky playing the 1st Piano Concerto were mostly from the Bristol University Music Department Orchestra. They were paid 7 guineas a day (£7 and 7 shillings) each - the extras in the audience were only on 5 guineas. The scene was filmed in the Music Room of Bath Spa.
In a biography of Alan Bates director Ken Russell mentions how he offered Bates the lead role of Tchaikovsky during the filming of Women in Love (1969). Although Bates admired the script he turned the role down.