| Sibford School |
| Sidcot School |
| Sir Roger Manwood's School |
| Skegness Grammar School |
| Slindon College |
| St Andrew's School |
| St Antony's Leweston |
| St Aubyn's School |
| St Bede's |
| St Bede's The Dicker |
| St Bee's School |
| St Brigid's School |
| St Catherine's School |
| St Christopher School |
| St Columba's College |
| St David's College Llandudno |
| St David's School Ashford |
| St Dunstans Abbey |
| St Edmund's College |
| St Edmund's School Canterbury |
| St Edward's School |
| St Felix School |
| St Francis' College |
| St George's Ascot |
| St George's Harpenden |
| St George's School for Girls |
| St Helen's School |
| St James' School Lincolnshire |
| St James' School Malvern |
| St Johns Beaumont |
| St John's College |
| St John's School Leatherhead |
| St John's School Sidmouth |
| St John's School Surrey |
| St John's-on-the-Hill |
| St Joseph's College |
| St Lawrence College |
| St Leonards School |
| St Leonards-Mayfield School |
| St Margaret's School Bushey |
| St Margaret's School Edinburgh |
| St Mary's Hall Brighton |
| St Mary's Hall Lancashire |
| St Mary's School, Ascot |
| St Mary's School, Calne |
| St Mary's School, Cambridge |
| St Mary's School, Shaftesbury |
| St Mary's School, Wantage |
| St Michaels College |
| St Paul's School |
| St Peter's School |
| St Swithun's School |
| St Teresa's School |
| Stamford High School |
| Stamford School |
| Stanborough School |
| Stanbridge Earls School |
| Stewart's Melville College |
| Steyning Grammar School |
| Stonar School |
| Stonyhurst College |
| Stover School |
| Stowe School |
| Strathallan School |
| Sunningdale School |
| Sutton Valence School |
| Talbot Heath |
| Taunton ISC |
| Taunton School |
| Temple Grove |
| Tettenhall College |
| The Arts Educational School |
| The Edinburgh Academy |
| The Godolphon School |
| The King's School, Canterbury |
| The King's School, Ely |
| The Leys School |
| The Mount School York |
| The Oratory School |
| The Park School |
| The Pilgrims' School |
| The Princess Helena College |
| The Purcell School |
| The Royal Alexandra and Albert |
| The Royal High School, Bath |
| The Royal Hospital School |
| The Royal Masonic Sch. Girls |
| The Royal Wolverhampton School |
| The Thomas Adams School |
| The Towers Convent School |
| The Westgate School |
| Thornton College |
| Tockington Manor |
| Tonbridge School |
| Trent College |
| Trinity School |
| Truro High School for Girls |
| Truro School |
| Tudor Hall School |
| Twyford School |
| Uppingham School |
| Ursuline College |
| Vinehall School |
| Warminster School |
| Warwick School |
| Wellesley House |
| Wellington College |
| Wellington School |
| Wells Cathedral School |
| Wentworth College |
| West Buckland School |
| Westbrook Hay Prep School |
| Westminster School |
| Westonbirt School |
| Winchester College |
| Windermere St Anne's School |
| Windlesham House |
| Wispers School |
| Woldingham School |
| Woodbridge School |
| Woodhouse Grove School |
| Worksop College |
| Worth School |
| Wrekin College |
| Wychwood School |
| Wycliffe |
| Wycombe Abbey School |
| Wymondham College |
