On July 31, 1987, a fire broke out on a Piccadilly Line train at Kings Cross Station in London, killing 31 people and injuring more than 100. The fire was thought to have been caused by a cigarette or match falling onto the stations wooden escalators. The tragic event was one of the deadliest railway accidents in British history. It prompted significant changes in the design and safety standards of Londons underground system, including the installation of smoke detectors. The tragedy highlighted the dangers of poor safety precautions and outdated infrastructure.