Halcyon London International School in Marylebone announced plans for a new rooftop garden to create an outdoor learning and community space overlooking the Marylebone neighbourhood. The garden is scheduled to open for the 2025-26 academic year.
Senior school
Halcyon London International School
Halcyon London International School offers a rigorous International Baccalaureate programme with a focus on personalised learning and holistic development.
Day fees
£34,200 – £35,760
Entry
Interview + ReferenceSelective
Next deadline
Mon 9 Nov 202616+ registration closes
Updated 4 months agosource
At a glance
Key facts
Head
Ben Stocks
Director
Gender
Co-ed
Pupils
157
71 girls, 94 boys
Location
Marylebone, Westminster
Urban setting
Day or boarding
Day
Age range
11 to 18
Founded
2013
Sixth form
48 pupils
Entry points
11+, 16+
Nearest station
Marylebone
Average class
12 pupils
Show 5 more factsShow fewer facts
School day
9am to 4pm
Saturday school
No
Wraparound care
Available
Bursaries
Up to 100% of fees
Scholarships
Academic
Overview
About Halcyon London International School
Halcyon London International School is an English-speaking International Baccalaureate school offering the IB Middle Years Programme (MYP) for Grades 6-10 (ages 11-15) and the IB Diploma Programme for Grades 11-12 (ages 16-18). The school fosters an innovative, collaborative, and community-oriented environment, supporting students to achieve their unique potential. Halcyon values academic rigour, diverse assessment methods, and a holistic approach to admissions and student development.
Houseroom EditorialOur take
Houseroom Editorial
Our take
Independent co-ed senior school in Westminster for ages 11–18. Selective entry, top-tier London fees.
Best for
- Families seeking a senior school for ages 11–18, with thinking already on 11+ or 13+ entry.
- Families who prefer a co-educational setting over single-sex.
- Children who can demonstrate strong academics at entry assessment — this is a selective school.
- Families comfortable with top-tier London independent fees in exchange for the level of provision.
- Internationally-mobile families wanting IB or American-style qualifications rather than only A-levels.
Watch-outs
- Fees sit at the top of the London market. Factor in extras (uniform, trips, lunches, music tuition) before committing.
- Selective entry — assume some form of assessment at the relevant entry point. Plan tutoring or familiarisation early if needed.
- Curriculum is IB/American-style rather than A-Level. Check that your university plans (UK or otherwise) align before committing to the route.
AdmissionsApplication timeline
Admissions
Application timeline
September 2027 entryRegistration openCloses 9 Nov 2026Reply by 8 Jan 2027
- TBCOpen dayTo be confirmedDate TBCDiploma Programme Open Evening
- Nov9Registration closesNext
- Jan15Bursary deadlineBridge Scholar Bursary
- Dec11Offers
- Jan8Acceptance deadline
Not yet published: registration opens, assessment, interview.
UpcomingOpen events
Upcoming
Open events
Private tours by arrangement with admissions.
Fees & costFees
Fees & cost
Fees
£34,200 – £35,760per year · Day · 2026-27
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Quick answers about Halcyon London International School
Answered only from Halcyon London International School's verified details on Houseroom, with sources. For anything else, ask admissions.
Financial supportBursaries & Scholarships
Financial support
Bursaries & Scholarships
What sets it apartDistinctive features
What sets it apart
Distinctive features
International Baccalaureate curriculum (MYP and Diploma Programme)
Not-for-profit school
Research-driven wellbeing approach
High teacher-to-student ratio
Personalised mentoring
Central London location
Emphasis on digital and cutting-edge technology integration
Beyond the classroomActivities & co-curricular
Beyond the classroom
Activities & co-curricular
sport
Sports Programme
academic club
Mother Tongue Programme
other
Extra-curricular clubs (before school, after school, lunchtime)Halcyon Parent Community (HPC)
On campusFacilities
On campus
Facilities
academic
Campus (central London)
OutcomesLatest exam results
Outcomes
Latest exam results
Outcomes
Our Class of 2025 IB Diploma students achieved excellent results, gaining places at prestigious global universities including LSE, UCL, Imperial College London, and top international institutions. The results reflect not only strong grades but also collaborative teamwork and diverse talents.
DestinationsWhere leavers go
Destinations
Where leavers go
| 2025 | 2024 | |
|---|---|---|
| Cohort | — | 25 |
| Oxbridge | — | 0 |
| Russell Group | — | 8 |
| US Ivy | 0 | 0 |
| Medicine | — | 0 |
Top universities (2025)
St AndrewsUniversity of SurreyCambridgeLSEUniversity of LiverpoolMcGill UniversityImperial College LondonRIT
CurriculumQualifications offered
Curriculum
Qualifications offered
International Baccalaureate Middle Years Programme (MYP)International Baccalaureate Diploma Programme (IBDP)
In the newsRecent coverage
In the news
Recent coverage
2025
Halcyon London International School had 24% of students scoring more than 40 points and two students achieved the maximum score of 45 points on the IB Diploma.
Recommended next step
Registration closes 9 Nov 2026 (11+)
Add it to your plan and book a visit before you apply.
Fit for your child
Is Halcyon London International School right for your child?
Score it on travel, academics, support and budget.
Check fit for my childCalendarTerm dates 2026/27
Calendar
Term dates 2026/27
Autumn2 Sept 2026 → 11 Dec 2026Half-term 26 Oct 2026–30 Oct 2026
Spring5 Jan 2027 → 24 Mar 2027Half-term 15 Feb 2027–19 Feb 2027
Summer12 Apr 2027 → 1 Jul 2027
Halcyon London International School term dates and holidays →
PathwaysFeeder schools
Pathways
Feeder schools
1 offer
GovernancePolicies & documents
Governance
Policies & documents
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Also consider
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FAQQuestions parents ask
FAQ
Questions parents ask
What kind of child is Halcyon London International School best for?+
Halcyon London International School suits: Families seeking a senior school for ages 11–18, with thinking already on 11+ or 13+ entry; Families who prefer a co-educational setting over single-sex; Children who can demonstrate strong academics at entry assessment — this is a selective school; Families comfortable with top-tier London independent fees in exchange for the level of provision; Internationally-mobile families wanting IB or American-style qualifications rather than only A-levels.
How much are the fees at Halcyon London International School?+
Day fees at Halcyon London International School are £11,400 to £11,920 a term in 2026-27 (£34,200 to £35,760 a year). Extras such as lunches, uniform and trips are on top.
When is the next open day at Halcyon London International School?+
No dates are listed yet. Save Halcyon London International School and we'll email you when booking opens.
How does admissions work?+
Halcyon London International School is selective. Expect an entrance assessment at each entry point.
Does Halcyon London International School support SEND?+
Halcyon London International School offers some SEND support. Ask admissions which needs it can meet.
What ages does Halcyon London International School take?+
Halcyon London International School takes pupils from age 11 to 18.
Is Halcyon London International School a day or boarding school?+
Halcyon London International School is a day school.
Is Halcyon London International School co-educational or single-sex?+
Halcyon London International School is co-educational, taking both boys and girls.
Where is Halcyon London International School?+
Halcyon London International School is in Westminster, W1H 5AU.
How do I contact admissions at Halcyon London International School?+
Contact Halcyon London International School by email at join@halcyonschool.com or phone on 02072581169.
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