Southbank International School Westminster is an independent day school in Westminster, London, for pupils aged 11 to 18 for boys and girls. GIAS records 456 pupils on roll and a published capacity of 620.
Figures can refer to different reporting periods. Check the date and source shown beside each section. How Classpot uses published data.
Official identity and contact facts; operational fees and services appear only when separately reviewed.
Source: GIAS establishment record · published 20/08/2026
Official figures for 2025/26.
Source: official publication (04/06/2026) · official publication (04/06/2026)
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