The NatWest Trophy was a limited-overs cricket tournament held in England and Wales from 1981 to 2000. It was a one-day competition featuring county teams and was sponsored by the National Westminster Bank, commonly known as NatWest. The tournament was known for its knockout format, culminating in a final that determined the champion. The competition was significant in promoting one-day cricket in the UK and helped to popularize the format among fans. Over its two decades, various counties competed for the trophy, with Lancashire and Surrey being among the most successful teams in the tournament's history.