I need you to write some articles. I need you to write some articles about Heathrow tunnel collapse in October 1994 . Need to wire 8 pages as background (introduction) for example (when construct- reason for tunnel & more .......) then when & why collapse!!
Then write about ethics problems happened in this case?! Also no need to blame directly someone for collapse (point out). For ethics need to talk about warning of danger + negligence + health & safety.