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Halcyon London International School
33 Seymour Place, London, W1H 5AU
Independent school for ages 11–18 in London. Mixed intake.
Halcyon London International School is an independent school in Westminster, London, teaching boys and girls aged 11 to 18. It has a sixth form and a small-school scale.
The school describes itself as a not-for-profit International Baccalaureate school in Marylebone, with an innovative curriculum, academic curiosity, wellbeing work and technology integrated into learning. An ISI inspection in October 2024 found standards and safeguarding met.
Ages 11–18 · Secondary age
165 pupils · On roll
Independent school · Mixed