Question: What role is the twin of Elaine Thompson most notable for playing in the television series "Casualty"?  
Sentence (from "Holby City (series 1)"): The show was created by Mal Young and Tony McHale as a spin–off from the BBC medical drama "Casualty", intended to follow the treatment of patients from "Casualty" as they were transferred onto the hospital's surgical wards.
Relevant evidence: No