Frankie Ellish was the personal assistant of Jack Robertson and his niece's wife. After he chose to cover up a toxic landfill underneath one of his hotels, she decided to reveal it to the public. She also witnessed her employer fire Najia Khan.
However, as she attempted to film it, Frankie was attacked by a spider created by the waste. Her body was later found by the Thirteenth Doctor and Jack in a web cocoon as they investigated the area. (TV: Arachnids in the UK)