Elias of London also known as Elijah ben Moses or Elias le Evesque, was Presbyter Judaeorum in 13th-century England.
He is not to be confused with Eliyahu Menachem of London, one of the Rishonim who lived from 1220-1284. Some of the below details, taken from the Jewish Encyclopedia article, may refer to Eliyahu Menachem.