Upstairs, Downstairs - Out of Costume - During Upstairs, Downstairs 1

Gordon Jackson and his wife, actress Rona Anderson, photographed in the mid-Seventies. During his life, Jackson starred in more than 80 feature films but Mr Hudson was probably his most famous role.

Simon Williams photographed in the mid-seventies with his wife, actress Belinda Carroll. Though the marriage ended in the late seventies, the relationship produced two children – Tam and Amy – who have both followed their parents into the acting profession. Simon later married another actress, Lucy Fleming.

David Langton played Richard Bellamy, master of 165 Eaton Place, from the first episode to the last. Langton (real name Basil Muir Langton-Dodds) had been working in theatre since he was 16, but his role as Richard, which made him a household face, came later, when he was aged 58.

Jenny Tomasin out of her of Ruby guise. "I feel the series might have limited me," says Tomasin. "There are a lot of strong-woman parts I could have played, which nobody would see me as." Jenny died in 2012.

What on Earth? Why is Thomas the chauffeur at 165 locked in an embrace with the future Lady Bellamy? Never fear, you haven't missed an episode... John Alderton and Hannah Gordon both starred in My Wife Next Door, a 13-episode BBC sitcom broadcast in late 1972. The 1970s churned out numerous comedies based on the same sort of theme. In this one, married couple Alderton and Gordon get divorced and move apart. And, yep, you've guessed it from the title – they unwittingly end up moving in next door to each other.

A rare shot of Rachel Gurney, right, out of her Lady Marjorie costume and wig. She is surrounded by Freddy Shaughnessy, David Langton and Lesley-Anne Down at a special fête at Ringwold House in 1975 to mark the end of the series.