HA2 0HN John Lyon School | North West London Independent Day SchoolJohn Lyon is a leading independent day school, with academic, sporting and artistic excellence, based in Harrow-on-the-Hill, North West London.John Lyon School | North West London Independent Day School Quainton Hall (John Lyon's Prep School) Academic excellence is at the very heart of what pupils who study here seek to achieve. With the opportunity to explore a broad curriculum and gain a solid https://www.johnlyon.org/