2022–23 Participating Schools
- Alleyn’s School
- Bexley Grammar School
- Caterham School
- Channing School
- City of London School
- Dulwich College
- Eltham College
- Emanuel School
- The Hurlingham Academy
- Ibstock Place School Host for 2023
- James Allen’s Girls’ School
- The King Alfred School
- Kingston Grammar School
- Latymer Upper School
- Old Palace of John Whitgift School
- Portsmouth Grammar School
- Reed’s School
- Royal Grammar School, Guildford
- Royal Russell School
- Surbiton High School
- Trinity School
- West London Free School
- Whitgift School