Why did 16year old boy die in hull drain in 1983?

In 1983, a 16-year-old boy named Michael O'Brien tragically drowned in a drain in Hull, England, after he and his friends were playing near it. The incident occurred when he fell into the drain while trying to retrieve a football. Poor safety measures and the lack of adequate barriers around the open drainage system contributed to the tragedy, leading to public outcry and calls for improved safety standards in the area.