She was considerably more than the voice of one puppet, not only playing a full role in the other Anderson projects such as Captain Scarlet and Stingray, but also acting as producer for other shows, but to me she will always be Lady P -- brave, intelligent, stylish, and generally FAB.
Sylvia Anderson, voice of Thunderbirds' Lady Penelope, dies - BBC News
Sylvia Anderson, voice of Thunderbirds' Lady Penelope, dies - BBC News