| All Day | Week 3(A) Term Dates | Details |
| 07:30-08:15 | Year 11 Athletic Development (Autumn Term 2021) Venue: School Gym Co-Curricular, Sports Clubs | Details |
| 08:15-08:45 | Percussion Ensemble Autumn 2021 Venue: Recital Hall Co-Curricular, Music | Details |
| 08:15-08:45 | Music Theory Class Autumn 2021 Venue: Music Classroom Co-Curricular, Music | Details |
| 08:35 | Tour Guide Assembly Venue: Great Hall Admissions | Details |
| 13:45 | Swim Squad Trials (Middle and Upper School) Venue: Swimming Pool Divisions, Fifth Form, Lower Sixth Form, Sport, Swimming, Upper Sixth Form | Details |
| 13:50-14:30 | Chamber Choir Autumn 2021 Venue: Recital Hall Co-Curricular, Music | Details |
| 13:50-14:35 | Drama Club - Senior (Autumn Term 2021) Venue: Studio Theatre Co-Curricular, Clubs (Co-curricular) | Details |
| 13:50-14:35 | Maths Clinic Venue: Ma10 Co-Curricular, Clubs (Co-curricular) | Details |
| 13:50-14:40 | Physiotherapy (Autumn Term 2021) Venue: School Gym Co-Curricular, Sports Clubs | Details |
| 13:50-14:40 | The Hour S&C (Autumn Term 2021) Venue: School Gym Co-Curricular, Sports Clubs | Details |
| 13:50-14:40 | Junior Rugby Club (Autumn Term 2021) Venue: Flagstaff Pitch Co-Curricular, Sports Clubs | Details |
| 13:50-14:40 | Table Tennis Club (Autumn Term 2021) Venue: Sports Hall Co-Curricular, Sports Clubs | Details |
| 13:50-14:40 | Art & Design GCSE and A level support (Autumn Term 2021) Venue: Teaching classrooms Co-Curricular, Academic Co-Curricular | Details |
| 13:50-14:40 | Astrophysics Club (Autumn Term 2021) Venue: PH11 Co-Curricular, Academic Co-Curricular | Details |
| 13:50-14:40 | Sixth Form Chemistry Drop-in (Autumn Term 2021) Venue: Ch48 Co-Curricular, Academic Co-Curricular | Details |
| 13:50-14:40 | Afro Caribbean Society (Autumn Term 2021) Venue: Ma9 Co-Curricular, Club | Details |
| 13:50-14:40 | Careers 'Drop in' and Insights (Autumn Term 2021) Venue: Careers Office/Careers Library Co-Curricular, Club | Details |
| 13:50-14:40 | Strategy Board Game Club (Autumn Term 2021) Venue: Ma2 Co-Curricular, Club | Details |
| 13:50-14:40 | Hansard Society (Autumn Term 2021) Venue: Ep54A Co-Curricular, Academic Co-Curricular | Details |
| 13:50-14:40 | Maths Society (Autumn Term 2021) Venue: Ma10 Co-Curricular, Academic Co-Curricular | Details |
| 13:50-14:40 | Senior Play (Autumn Term 2021) Venue: Studio Theatre Co-Curricular, Drama | Details |
| 13:50-14:40 | Jewish Society (Autumn Term 2021) Venue: Chaplaincy Co-Curricular, Faith | Details |
| 13:50-14:40 | Debating Society (Autumn Term 2021) Venue: Hy2.52 Co-Curricular, Outreach | Details |
| 13:50-14:40 | Meditation Club (Autumn Term 2021) Venue: Ph14 Co-Curricular, Outreach | Details |
| 13:50-14:40 | Squad Swimming Training (Autumn Term 2021) Venue: Swimming Pool Co-Curricular, Sports Clubs | Details |
| 14:40-15:40 | *** Strategy Team Meeting Committee & Meetings | Details |
| 14:45 | Rugby Union Boys-U14D vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 14:45 | Rugby Union Boys-U15A vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 14:45 | Rugby Union Boys-U15B vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 14:45 | Rugby Union Boys-U15C vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 14:45 | Rugby Union Boys-U14A vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 14:45 | Rugby Union Boys-U14B vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 14:45 | Rugby Union Boys-U14C vs Watford Grammar School for Boys Venue: H Sport, Rugby Union, Fixture | Details |
| 15:45 | Open Morning Preparation Time Committee & Meetings | Details |
| 15:45-16:45 | DET Scholars (Autumn Term 2021) Venue: DET Workshop Co-Curricular, Academic Co-Curricular | Details |
| 15:45-16:45 | Taylors' Milers (Autumn Term 2021) Venue: Athletics Track Co-Curricular, Sports Clubs | Details |
| 15:45-16:45 | String Chamber Music (Autumn Term 2021) Venue: Exam Hall/Mu82 Co-Curricular, Music | Details |
| 15:45-16:45 | Vex EDR - Competitive Robotics (Autumn Term 2021) Venue: Design Centre Co-Curricular, Outreach | Details |
| 15:45-16:45 | Cricket Training: Year 7A (Autumn Term 2021) Venue: Indoor Cricket Nets Co-Curricular, Sports Clubs | Details |
| 15:45-16:45 | Senior Play (Autumn Term 2021) Venue: Studio Theatre Co-Curricular, Drama | Details |
| 15:45-16:45 | Senior Geography Society (Autumn Term 2021) Venue: Gy2.2 Co-Curricular, Academic Co-Curricular | Details |
| 15:45-16:45 | Strategy Board Game Club (Autumn Term 2021) Venue: Ma2 Co-Curricular, Club | Details |
| 15:45-16:45 | Young Enterprise (Autumn Term 2021) Venue: MTS & Virtually Co-Curricular, Club | Details |
| 15:45-16:45 | Tennis Club (Y11-13) (Autumn Term 2021) Venue: Tennis Courts Co-Curricular, Sports Clubs | Details |
| 15:45-16:45 | Kayak Club (Autumn Term 2021) Venue: Watersports Centre/Swimming Pool Co-Curricular, Sports Clubs | Details |
| 15:45-16:45 | Rowing Club (Autumn Term 2021) Venue: Watersports Centre Co-Curricular, Sports Clubs | Details |
| 15:45-17:00 | Kayak Club (Autumn 2021) Venue: MTS Lake Co-Curricular, Outdoor Education | Details |
| 15:45-17:15 | Drama Club - Senior (Autumn Term 2021) Venue: Studio Theatre Co-Curricular, Clubs (Co-curricular) | Details |
| 15:50-14:30 | String Quartet (SC) Autumn 2021 Venue: Exam Hall Co-Curricular, Music | Details |
| 15:50-16:30 | Choir – Trebles and Altos Autumn 2021 Venue: Recital Hall Co-Curricular, Music | Details |