| Delegation | SCHOOL |
| Algeria (SC) | Harris Academy, Bermondsey |
| Argentina | St George’s British School |
| Australia | Cours St Charles |
| Austria | St George’s British School |
| Bangladesh | St Joseph’s Gr/Fr School |
| Belarus | Shrewsbury School |
| Brazil | Royal Russell School |
| Burkina Faso | Box Hill School |
| Cameroon | Santa Margarita Catholic High |
| Canada | Croydon High School |
| China (SC) | Terenure College |
| Congo (Dem Rep) | Habs Elstree |
| Costa Rica | Coloma |
| Cote d’Ivoire | George Cosbuc College |
| Cuba | Harris Academy, Bermondsey |
| Cyprus | Santa Margarita Catholic High |
| Denmark | Cours St Charles |
| Ecuador (SC) | Rathdown School |
| Finland | St George’s British School |
| France (SC) | Lingfield College |
| Georgia | Ampleforth College |
| Germany | Catholic University School |
| Greece | St Joseph’s Gr/Fr School |
| Guyana (SC) | Box Hill School |
| Haiti | Habs Elstree |
| India | Bishop Thomas Grant |
| Iran | Royal Russell School |
| Iraq | Coloma |
| Ireland | Frankfurt Int’l School |
| Italy | St George’s British School |
| Jamaica | Wesley College |
| Japan (SC) | ÅS Videregaende Skole |
| Jordan | St Joseph’s Gr/Fr School |
| Kenya | St Gerard’s School |
| Korea (Dem Rep) – North | Gordon’s School |
| Korea (Rep) – South (SC) | Cours St Charles |
| Kyrgyzstan | Croydon High School |
| Mali | St Joseph’s Gr/Fr School |
| Malta (SC) | Croydon High School |
| Mauritania | Wesley College |
| Mexico | Frankfurt Int’l School |
| Mozambique (SC) | Cheadle Hulme School |
| Myanmar | Terenure College |
| Nauru | Bishop Thomas Grant |
| Netherlands | Royal Russell School |
| New Zealand | Civico Polo Scolastico, Milan |
| Nigeria | Blackrock College |
| Oman | 8th Lyceum of Maroussi |
| Pakistan | Croydon High School |
| Peru | St George’s British School |
| Philippines | Hitachi First High School |
| Philippines | Hitachi First High School |
| Poland | Cheadle Hulme School |
| Portugal | 8th Lyceum of Maroussi |
| Russian Fed (SC) | Haileybury College |
| Saudi Arabia | Sutton High School |
| Senegal | Terenure College |
| Sierra Leone (SC) | Gordon’s School |
| Singapore | Gonzaga College |
| Slovenia (SC) | Blackrock College |
| South Africa | Santa Margarita Catholic High |
| South Sudan | Habs Elstree |
| Spain | Alexandra College, Dublin |
| Sri Lanka | Cheadle Hulme School |
| Sudan | Civico Polo Scolastico, Milan |
| Switzerland (SC) | Habs Elstree |
| Syria | Box Hill School |
| Thailand | St Andrew’s College |
| Türkiye | Frankfurt Int’l School |
| UAE | Civico Polo Scolastico, Milan |
| Uganda | St Andrew’s College |
| Ukraine | St Andrew’s College |
| United Kingdom (SC) | St Joseph’s Gr/Fr School |
| United States (SC) | St Andrew’s College |
| Venezuela | Shrewsbury School |
| Viet Nam | St Andrew’s College |
| Yemen | St Andrew’s College |
