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Halcyon London International School

United Kingdom, London

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The school at a glance
Instructs in English
Fees £31,041 - 31,644
Ages 11 - 18 years
Pupil numbers 172
Type Co-educational
Opened 2013
Bus Service No
Availability Not shared by this school
Academic offering
Curriculum IB (MYP), IB (DP)
Taught languages Spanish, Mandarin, French, Swedish, Japanese
Typical class size 15
Strengths Sport, Visual and Creative Arts, Languages
Clubs Arts and Creative, Cultural and Language, Social and Hobbies
Stages Secondary School, Sixth Form
Introduction

Halcyon London International School is a not-for-profit, co-educational IB world school in London for students aged 11 to 18. The curriculum blends the IB Middle Years Programme (MYP) and the IB Diploma Programme (DP), with no GCSEs offered. Students in Grades 6–10 follow the MYP; Grades 11–12 pursue the DP, with some candidates earning IB certificates instead of the full Diploma. All qualifying students receive an accredited U.S. high school diploma. The school's on-site subject offering spans Language A and Language B, Mathematics, Sciences, Economics, History, Geography, Psychology, Business, and the Arts, with some online options and Mother Tongue language support. Halcyon's facilities include a Design Lab with a 3D printer and laser cutter, a well-equipped library, and dedicated DP study and careers spaces. The Innovation Team leads work on AI, service, and international mindedness. London's cultural and academic opportunities extend beyond the campus, enriching learning through institutions and trips.

www.halcyonschool.com

33 Seymour Pl, London W1H 5AU, United Kingdom

Vibes and Culture
The school has not added this information
The Essentials

Halcyon London International School has 172 pupils, typical class sizes of 15, instruction in English.

Location
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.

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

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

Pupil Nationality Mix
156 students; 40+ nationalities represented.

Additional learning support
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.

Country affiliation
United Kingdom

School day structure
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.
Diving Deeper
The school has not added this information
Fees

Annual tuition at Halcyon London International School ranges from GBP 31,041 to GBP 31,644 for 2026/27.

Application fees and deposits

- Application fee: GBP 375 (inclusive of VAT).
- Acceptance deposit: GBP 1,800 (inclusive of VAT). Payable on acceptance of a place and refundable when the student leaves.
- Development fee (new student): GBP 2,250. Development fees are not prorated and are non-refundable.
- Development fee (returning student): GBP 125. Development fees are not prorated and are non-refundable.

Tuition fees (by year group)

- Grade 6–9: GBP 10,866 per term. Annual equivalent (three terms per academic year): GBP 32,598. Fees are stated on a termly basis.
- Grade 10: GBP 11,144 per term. Annual equivalent (three terms per academic year): GBP 33,432. Fees are stated on a termly basis.
- Grade 11–12: GBP 11,360 per term. Annual equivalent (three terms per academic year): GBP 34,080. Fees are stated on a termly basis.

Please note: the published tuition figures are termly amounts and the school operates three terms in the academic year. Tuition fees are not prorated and are non-refundable.

Billing schedule and payment terms

- Fees are published as termly amounts and correspond to the school's three-term academic calendar. Tuition is charged on a termly basis. Tuition fees are not prorated and are non-refundable. Specific invoice dates and payment-deadline terms are not published on the public fee summary.

Boarding

- Halcyon is a day school; boarding is not provided. Students must live with their parent(s) or legal guardian while enrolled.

Other costs and regularly recurring extras

- Digital device: cost variable depending on device (Grades 6–9: Apple iPad; Grades 10–12: laptop).
- Digital apps: approximately GBP 50 per school year.
- PE kit: typically GBP 15–30 per item.
- Sports programme (optional): GBP 100 per term.
- Halcyon Parent Community subscription: GBP 40 per school year.
- Mother Tongue Programme and limited optional trips: fees vary depending on course or trip location.

Additional inclusions in tuition (no separate charge): morning snack, daily vegetarian lunch, many day trips, an annual residential trip, examination fees, books and materials for art and science, and Pamoja online tuition for applicable courses. All of these are listed as included within the tuition. Tuition is described as non-refundable and not prorated.

Tax / VAT treatment

- The school's published material states that fees are liable for VAT at 20% and explains which items are shown inclusive of VAT (for example, the application fee and acceptance deposit are shown inclusive of VAT). Some other fees are published exclusive of VAT unless otherwise stated.

Refund information

- Acceptance deposit: refundable when the student leaves.
- Tuition fees: not prorated and non-refundable.
- Development fees: not prorated and non-refundable.

Fee payment options

- The school's public fee summary provides the amounts, deposits and the terms above; explicit, detailed payment-method instructions (for example, which card types are accepted, whether online card payment, Flywire, or particular bank-transfer instructions are offered) are not provided on the publicly published fee summary. For confirmed payment methods and invoice/payment instructions, contact the Admissions or Finance team directly using the published school contact details.

Summary of what was checked and what is not published in the public fee material

- Published and verifiable items included here: termly tuition amounts by grade band, application and acceptance deposits, development fees, the list of additional/optional costs and inclusions, VAT status, non-refundable and non-proration rules, and that the school is a day school. These items are taken from the school's published fee information and the school's term calendar confirming three terms per year.
- The school's publicly posted fee pages do not include detailed invoice-dates, payment deadlines, or an explicit list of accepted electronic payment methods. For the exact billing schedule, invoice timing, and accepted payment methods, contact Admissions or the Finance office using the school's published contact numbers.
Academics

Halcyon London International School teaches IB (MYP), IB (DP) for students aged 11 to 18.

Curriculum
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.

Student Teacher Ratio
5:1

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

Higher Education Progression
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).

Gifted and Talented
Generous means-tested bursaries are available for academically high-attaining students.
Wellbeing
The school has not added this information
Parent Experience
The school has not added this information
Facilities
The school has not added this information
Extra-Curricular Activities
The school has not added this information
Languages
The school has not added this information
Reputation
The school has not added this information
Admissions

Admissions
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.

Scholarships
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.
School Events
The school has not added events
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