Halcyon London International School
33 Seymour Place, London, W1H 5AU

Halcyon is a leading International Baccalaureate school for students aged 11 to 18 – the only not-for-profit IB school in London. Halcyon’s mission is to provide an exceptional education that draws out the unique potential of each student.
Notable Academic Facilities
Halcyon’s school library is a vibrant hub for learning and exploration. During school hours, students can enjoy a cosy onsite library, perfect for browsing and reading. The library truly excels with an extensive online catalogue, accessible 24/7 from anywhere in the world. Additionally, every student receives membership to the Westminster Library, granting them both online and in-person access to a vast collection of books and academic journals, ideal for their research and academic pursuits.
Their Mother Tongue Programme offers their students a way to connect with their linguistic heritage and home culture as they take their reading, writing, speaking, and listening skills to a higher level. They currently offer a range of over 10 Mother Tongue languages including French, Swedish, and Japanese – they can adjust these options in response to students’ needs.
Wellbeing & Pastoral Care
Halcyon’s Wellbeing Programme is designed to offer an exceptional, student-led experience grounded in a positive approach to wellbeing. Halcyon prioritises a human-centred approach, ensuring that all aspects of the school are built on strong, relational foundations. The Wellbeing Programme at Halcyon offers the following elements as part of its human-centred approach:
- Restorative Practice: An approach to ‘behaviour and discipline’ that builds healthy, respectful relationships. Through structured dialogue students are able to resolve conflict and encourage students to take personal responsibility.
- Mentoring: As trained cognitive coaches, teachers are paired with a mentor, holding at least 15 minutes of private conversation together each week.
- Mindfulness: All Halcyon teachers are cognitively trained and embed mindfulness practices into classroom lessons to encourage effective/focused learning.
- Counsellor: A school counsellor is available two days a week to support student mental health.
SEN Information
Halcyon has a dedicated Learning Coach who liaises with parents/carers, and other relevant professionals to determine whether a student has an additional learning need, what these needs might be, what outcomes might be expected, and what provision would be needed to support the student.
Advice For Parents
Halcyon recommends that parents first explore the website to gain a sense of its ethos and community. If they feel the school may be a good fit, they are encouraged to get in touch to arrange a visit or an online meeting to learn more.
Highly Regarded For
Halcyon London International School is highly regarded as the only non-profit International Baccalaureate School in London, reinvesting resources into educational provision rather than shareholder returns.
Halcyon is highly regarded for its unique position as a well-being-focused, research-driven, and non-hierarchical institution. It is known for pioneering a restorative, student-centered approach to the International Baccalaureate (IB). The school prides itself on helping students develop the core pillars of an IB education: critical thinking, communication, and cultural competence.
Leavers' Attainment
Over the past five years, Halcyon has established a consistent record of academic excellence. Halcyon students achieved a 99% IB Diploma pass rate, maintaining a five-year average score of 34.8—significantly outperforming the global average of 31.2. This high standard of achievement is marked by students scoring 40 points or higher every single year. As global citizens, Halcyon students are well prepared to pursue further education, with many going on to attend universities around the world.
Leavers' Destinations
Of the 25 students in the class of 2025, eight went on to attend prestigious Russell Group universities, including the London School of Economics, University College London, and Imperial College London.
Sports
Halcyon's central London location means it can use London as its playing field. Halcyon utilises London's exceptional sports facilities, such as its own Stern Hall, Hyde Park, Marshall Street, Regent's Park, Little Venice Sports Centre, Paddington Recreational Grounds, and Jubilee Community Leisure Centre. This ensures students have access to high-quality venues, promoting a balanced and engaging school experience.
Art
Halcyon’s vibrant studio space offers diverse media and materials, fostering creativity as students build their course process portfolios in an inspiring space. Halcyon displays student artwork throughout the building, infusing its wider environment with the creativity, joy and individuality of the studio.
Drama
Halcyon’s Stern Hall features a stage used for music and theatrical performances, as well as school assemblies. The school also offers dedicated classrooms for theatre arts. For larger productions—such as school plays and musicals—Halcyon books a professional venue, where it hosts its performances.
Music
Students have access to a wide range of instruments in school, for use in lessons as well as through our peripatetic classes. Students follow a varied digital curriculum including learning how to use Logic, the industry-standard music production software. Students can also take part in Halcyon's school band or perform in the annual music showcase.
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Sector: Independent
Type: Senior School, Sixth Form
Day/Boarding: Day Only
Setting: City
Total Pupils: 161
Ages Covered: 11, 12, 13, 14, 15, 16, 17, 18
Gender: Co-ed
Gender (sixth form): Co-ed
Religious Ethos: None
Opening Date: 01/06/2012
SEN: Limited range of SEN support
Ofsted Rating: Outstanding
Ofsted Date: 05/03/2020
Sibling Policy: No
Financial Assistance: Bursary
+ Add To My Schools ListEntry Routes: 6+, 7+, 8+, 10+, 11+
Selection: Not Academically Selective
Early Application: Available
Languages: French, Spanish, Chinese
Curriculum:
- International Baccalaureate MYP
- International Baccalaureate DP
Recreational Space:
Sports facilities in walking distance
