LONDON — The British government has banned Fred Phelps, the controversial anti-gay Kansas pastor, and his daughter from Britain because they are “fostering hatred.” Phelps, pastor of Westboro Baptist Church in Topeka, Kan., and his daughter, Shirley Phelps-Roper, were among 16 people named by the government May 5. Known for their “God Hates Fags” protest signs, they were cited specifically…