Halcyon London International School
“London as a Classroom”
Halcyon London International School is a co-educational, not-for-profit day school for pupils aged 11 to 18, situated in Marylebone. Founded in 2013, it is an International Baccalaureate (IB) World School offering the Middle Years and Diploma Programmes. The school’s ethos focuses on innovation, student agency, and a research-led approach to wellbeing and restorative practice. Recognised as a Google Reference School and Apple Regional Training Centre, it integrates advanced technology into its teaching. The school occupies a central site near Marble Arch, utilising local facilities including the Seymour Leisure Centre and Hyde Park for sport and recreation.
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Last updated on 10 March 2026 (not all data elements were necessarily updated on this date)
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