Isleworth and Syon School for Boys vs Marlborough Primary School
A head-to-head comparison of two schools in London, England, 969 m apart, using official English 2025 data. The better value in each row is highlighted.
Isleworth and Syon School for Boys
Isleworth · Academy secondary · Ages 11–18
951 students
Marlborough Primary School
Isleworth · Local authority primary · Ages 3–11
514 students
| Measure | Isleworth and Syon School for Boys Isleworth, London | Marlborough Primary School Isleworth, London |
|---|---|---|
| Success Index (England) | 44 Lower 50% | 81 Top 25% |
| Region rank | #416 of 640 | #338 of 1,720 |
| National rank | #2264 of 4,090 | #2042 of 15,697 |
| Sector | Academy | Local authority |
| Type | Secondary | Primary |
| Year range | Ages 11–18 | Ages 3–11 |
| Students | 951 | 514 |
| Pupils on roll | 951 | 514 |
| Free school meals | 27.8% | 17% |
| Capacity filled | 97.1% | 77.9% |
| KS2 expected standard (RWM) | – | 78% |
| KS2 higher standard (RWM) | – | 19% |
| KS2 reading progress | – | – |
| KS2 writing progress | – | – |
| KS2 maths progress | – | – |
| Attainment 8 | 43.1 | – |
| Progress 8 | – | – |
| Grade 5+ English & maths | 38.3% | – |
| Grade 4+ English & maths | 54.5% | – |
| EBacc average points | 3.70 | – |
| A level points per entry | 34.1 | – |
| town | Isleworth | Isleworth |
| region | London | London |
| Website | www.isleworthsyon.org/ | www.marlboroughschool.net/ |
The verdict
- •Marlborough Primary School scores higher on the Success Index (England) (80.7 vs 44.2).
- •Isleworth and Syon School for Boys is the larger school with 951 students compared with 514.
- •Isleworth and Syon School for Boys is a academy school while Marlborough Primary School is a local authority school, so fees and admission rules differ.
- •Isleworth and Syon School for Boys is boys and Marlborough Primary School is co-educational.
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 Isleworth and Syon School for Boys better than Marlborough Primary School?
On the Success Index (England), Marlborough Primary School ranks higher (80.7 vs 44.2 out of 100). The index is built from published results and context data, not from teaching quality or fit, so visit both schools before deciding.
How far apart are Isleworth and Syon School for Boys and Marlborough Primary School?
About 969 m in a straight line, between Isleworth and Isleworth in London.
Which has the better Pupils on roll?
Isleworth and Syon School for Boys: 951. Marlborough Primary School: 514. Number of pupils in the latest school census.
How do Isleworth and Syon School for Boys and Marlborough Primary School rank in London?
Isleworth and Syon School for Boys is 416th of 640 and Marlborough Primary School is 338th of 1,720 among secondary schools in London on the 2025 Success Index (England).