After he was hospitalized because of a mental breakdown in late 1987, Miles moved to the United States. He finished last in the 1988 US Championship, but continued to play there and had some good results. In 1991, he played in the Championship of Australia, but he eventually moved back to England, and began to represent his home country again. He was equal first at the very strong Cappelle-la-Grande Open in 1994, 1995 and 1997. He also won the Capablanca Memorial in Cuba three times (1995, 1996, and 1999). His last tournament victory was the 2001 Canadian Open Chess Championship in Sackville, New Brunswick.