[1] In addition to serving as co-creator and co-writer on their TV series during the 1960s and early 1970s, Anderson's primary contribution was character development and costume design.

[1] That year, when Anderson and Arthur Provis created AP Films following Polytechnic's collapse, she joined them on the board of directors of the new company, alongside their colleagues John Read and Reg Hill.

Gerry tended to specialise in special effects and hardware, and Sylvia in character, voices, costume, dialogue and plotlines.

[8][9][6] In this way, Anderson contributed plot development and voice work for a series of half-hour shows including Supercar, Stingray and Fireball XL5.

However, she felt the half-hour format was insufficient to fully develop characters and stories, and she persuaded the team's TV producer Lew Grade to extend their shows to a full hour.

[1] Gerry announced his intention to separate on the evening of the wrap party,[10][11] following which Sylvia ceased her involvement with the company, which by this time had twice been renamed and was now called Group Three.

In 1983 she published a novel titled Love and Hisses[1] and in 1994 she reprised her voice role as Lady Penelope for an episode of Absolutely Fabulous.

[2][1] Her autobiography, Yes M'Lady, was first published in 1991;[10] in 2007, it was re-published as My FAB Years[12] with new material to bring it up to date with the latest developments in her life, such as her role as a production consultant for the 2004 live-action film adaptation of Thunderbirds.

Of the film, Anderson commented, "I'm personally thrilled that the production team have paid us the great compliment of bringing to life our original concept for the big screen.