Southbank International School Westminster vs The St Marylebone CofE School
A head-to-head comparison of two secondary schools in London, England, 428 m apart, using official English 2025 data. The better value in each row is highlighted.
Southbank International School Westminster
London · Independent secondary · Ages 11–18
456 students
The St Marylebone CofE School
London · Academy secondary · Ages 11–18
1,181 students
| Measure | Southbank International School Westminster London, London | The St Marylebone CofE School London, London |
|---|---|---|
| Success Index (England) | – Not rated | 83 Top 25% |
| Region rank | – | #111 of 640 |
| National rank | – | #519 of 4,090 |
| Sector | Independent | Academy |
| Type | Secondary | Secondary |
| Year range | Ages 11–18 | Ages 11–18 |
| Students | 456 | 1,181 |
| Pupils on roll | 456 | 1,181 |
| Free school meals | – | 26% |
| Capacity filled | 73.5% | 100.9% |
| KS2 expected standard (RWM) | – | – |
| KS2 higher standard (RWM) | – | – |
| KS2 reading progress | – | – |
| KS2 writing progress | – | – |
| KS2 maths progress | – | – |
| Attainment 8 | – | 61.0 |
| Progress 8 | – | – |
| Grade 5+ English & maths | – | 67.1% |
| Grade 4+ English & maths | – | 82.3% |
| EBacc average points | – | 5.43 |
| A level points per entry | – | 41.8 |
| town | London | London |
| region | London | London |
| Website | www.southbank.org | stmarylebone.school/ |
The verdict
- •The St Marylebone CofE School is the larger school with 1,181 students compared with 456.
- •Southbank International School Westminster is a independent school while The St Marylebone CofE School is a academy school, so fees and admission rules differ.
- •Southbank International School Westminster is co-educational and The St Marylebone CofE School is girls.
The Success Index (England) summarises published results and context from official data. It does not measure teaching quality or fit. Methodology.
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Frequently asked questions
Is Southbank International School Westminster better than The St Marylebone CofE School?
The two schools are very close on the Success Index (England). Differences in sector, size, programmes and distance from home will matter more than the score.
How far apart are Southbank International School Westminster and The St Marylebone CofE School?
About 428 m in a straight line, between London and London in London.
Which has the better Pupils on roll?
Southbank International School Westminster: 456. The St Marylebone CofE School: 1,181. Number of pupils in the latest school census.
How do Southbank International School Westminster and The St Marylebone CofE School rank in London?
Southbank International School Westminster is unranked and The St Marylebone CofE School is 111th of 640 among secondary schools in London on the 2025 Success Index (England).