Ruth (Invasion of the Dinosaurs)

Ruth, formerly known as Lady Cullingford, was a British environmental activist.

Biography
Ruth was one of the people selected by Sir Charles Grover to colonise New Earth and, along with Adam, was an Elder aboard the spacecraft.

When Sarah Jane Smith convinced them that they were not aboard a spacecraft at all but inside a bunker beneath London, Ruth, Adam and the other colonists confronted Grover and the scientist Whitaker who accidentally sent themselves into the past. (TV: Invasion of the Dinosaurs)