Symon Basterfield elected not to take part in this installment because he was in the midst of a divorce at the time.
Nicholas Hitchon's wife declined to appear in the film as she didn't care for the way her husband was depicted - and the criticism he subsequently attracted - in 28 Up (1984).
John Brisby had essentially fallen out with director Michael Apted at this stage so his segments were filmed by Apted's assistant.
John Brisby states in this installment that the only reason he continues to take part in the Up series of films is to publicize the Bulgarian charities that he works for.