Halcyon London International School

The school is located at 33 Seymour Place, London, W1H 5AU, in Marylebone, central London. It sits in the central London neighbourhood of Marylebone. The school is identified as Halcyon London International School in Marylebone, central London.

IB Middle Years Programme (MYP) and IB Diploma Programme (DP) for students aged 11 to 18.

The school operates on a not-for-profit model.

156 students; 40+ nationalities represented.

Halcyon provides accommodations for neurodivergent learners and counselling for social, emotional and mental health needs. The provision includes classroom support, differentiated lessons, digital tools, small group sessions, in-class assistance, specialist support, and a dedicated Learning Coach.

United Kingdom

ECAs start at 8am; lessons begin at 9am; lunch is provided; cognitive coaching, independent learning time and passion projects occur in the afternoons, with ECAs after 4pm.

Halcyon offers the International Baccalaureate Diploma (IB DP) and the IB Middle Years Programme (IB MYP) curricula and does not offer GCSEs. Grade 6–10 follow the IB MYP curriculum, while Grade 11–12 follow the IB DP, leading to external IB examinations; some students may take IB certificates instead of the full Diploma. All qualifying students also receive an accredited U.S. high school diploma. The on-site IB subject offerings include Language A: Language and Literature (English, Spanish, French, Mother Tongue); Language B: Language Acquisition (English, Spanish, French, Mother Tongue); Mathematics (Analysis and Approaches; Applications and Interpretations) at HL/SL; Sciences (Physics, Chemistry, Biology, Environmental Systems and Societies); Economics, History, Geography, Psychology, Business Management; The Arts (Music, Theatre, Film, Visual Arts), with some courses available online. Languages offered at various levels include English, Spanish, French, and Mother Tongue, with additional languages available at HL/SL.

5:1

Pass rate: 96%. Average IB Diploma score: 34; average highest Diploma Programme score: 41; 15% of students achieved 41+ points. 32 IB subject offerings.

Graduates pursue higher education at universities in the United Kingdom, United States, and Europe, including Imperial College London, University College London, King's College London, London School of Economics, University of Edinburgh, and University of Warwick; many graduates also matriculate at U.S. institutions such as Rhode Island School of Design (RISD), New York University (NYU), and The New School (Parsons).

Generous means-tested bursaries are available for academically high-attaining students.

The Wellbeing Programme is designed as a student-led, holistic approach to wellbeing. Halcyon uses a human-centred approach with relational foundations that foster autonomy and agency in learning. Students take ownership of their mental and emotional health, gaining lifelong skills for self-care and resilience. Wellbeing is foundational to academic, emotional, and social flourishing; when students feel safe, valued, and supported, they are more engaged. All teachers are trained as cognitive coaches and every student is assigned a teacher-mentor, with at least 15 minutes of private mentoring each week. The Wellbeing Team includes a Student Wellbeing Lead, a Restorative Practitioner, a Learning Coach, a Designated Safeguarding Lead and a Deputy.

Halcyon's admissions policy expects a strong academic background to manage the IB curriculum. The school is resourced to provide accommodations for frequently occurring needs for neurodivergent learners. A counselling service supports social, emotional and mental health needs. The school aims to unlock each student's potential through personalised educational approaches within an inclusive learning environment. Every child is encouraged to participate in all aspects of school life; the additional educational needs provision is an integral part of classroom practice and includes Classroom Support, Differentiated Lessons, Digital Tools, Small Group Sessions, In-Class Assistance, Specialist Support, and a Dedicated Learning Coach.

English Plus (EAL) is part of Halcyon's languages programme. It provides opportunities for students arriving from around the world to learn English. English Plus began with the arrival of IB English teacher Lindsey Fairweather in 2020 and has evolved since. It is delivered in coordination with Rahana Ahmed, who also supports progression to English B (Grades 10-12). The program is woven into subjects like science and maths, with teachers contributing to multilingual learners.

The school provides a counsellor available two days a week to support student mental health. Counselling sessions are available to anyone in the community, whether referred by the Wellbeing Team or requested directly. Mindfulness is embedded in classroom practice and all teachers are cognitively trained to deliver it. The Wellbeing Team includes a Student Wellbeing Lead, a Restorative Practitioner, a Learning Coach, a Designated Safeguarding Lead and a Deputy, ensuring mental wellbeing is a centralized concern. The Wellbeing Programme uses the Human Givens Institute's Emotional Needs Audit to address core emotional needs.

Halcyon is committed to safeguarding and promoting the welfare of all students. Safeguarding and child protection is everyone's responsibility; this policy applies to all staff, volunteers and trustees and extends to extended school and off-site activities. Staff and volunteers are expected to act in the best interests of the child and maintain an ‘it could happen here' mindset. The safeguarding team includes staff such as Asil Al-Shammari and Shah-Noor Ashraf. The school maintains staff recruitment safety procedures and anti-bullying and health and safety policies that apply across the school.

The school welcomes students prepared to embark on a rigorous International Baccalaureate programme of self-directed learning to discover their unique potential. The best way to understand Halcyon's learning approach is to visit classes on a guided tour led by the admissions team or a student ambassador, to hear first-hand the impact of Halcyon education. Private tours are offered throughout the year and Open Events allow families to meet the Director, Admissions Team and Student Ambassadors and observe classes in action. A Taster Evening for students entering Halcyon in 2026/27 is listed for 21 October 2025.

The school offers means-tested bursaries for academically high-achieving students who might not otherwise afford Halcyon, and hardship support for families facing unexpected financial changes. Details are organized under Our Bursary, including Scope, Eligibility and Application Process.