Additional reporting by Sofia Akin A devastated dad whose son was killed in a suspected hit-and-run has told how “yesterday I had two beautiful children, now I only have one”. Seven-year-old William Brown died after being struck by two vehicles in Sandgate, near Folkestone, when he went to retrieve a football at 5.35pm yesterday (Wednesday). Speaking to KentOnline while clutching a firefighter’s jacket, handed to him to stay warm in the street while his son fought for his life, William Brown Snr described his beloved little boy as a “gentle” and “wonderful child”. “He was so excited about Chri…