Amelia Ducat

Amelia Ducat was one of the world's leading flower artists. She had sold one of her paintings to Harrison Chase, who never paid her. When the Doctor and Sarah Jane Smith discovered the painting in the boot of a car driven by a man who had tried to kill them, they spoke with Ducat, learned that Chase had bought the painting, and traced the stolen Krynoid pod back to him. Ducat later visited Chase on the pretense of receiving her payment, but was secretly investigating on behalf of Sir Colin Thackeray. While there, she encountered Sarah Jane, who told her what had happened, and Ducat reported back to Sir Colin. (DW: The Seeds of Doom)