St Mary's School vs Twyford School
A head-to-head comparison of two all-through schools in South East, England, 83 km apart, using official English 2025 data. The better value in each row is highlighted.
St Mary's School
Gerrards Cross · Independent all-through · Ages 3–18
391 students
Twyford School
Winchester · Independent all-through · Ages 2–13
391 students
| Measure | St Mary's School Gerrards Cross, South East | Twyford School Winchester, South East |
|---|---|---|
| Success Index (England) | 28 Lower 50% | – Not rated |
| Region rank | #486 of 679 | – |
| National rank | #3075 of 4,090 | – |
| Sector | Independent | Independent |
| Type | All-through | All-through |
| Year range | Ages 3–18 | Ages 2–13 |
| Students | 391 | 391 |
| Pupils on roll | 391 | 391 |
| Free school meals | – | – |
| Capacity filled | 82.3% | 83.2% |
| KS2 expected standard (RWM) | – | – |
| KS2 higher standard (RWM) | – | – |
| KS2 reading progress | – | – |
| KS2 writing progress | – | – |
| KS2 maths progress | – | – |
| Attainment 8 | 37.6 | – |
| Progress 8 | – | – |
| Grade 5+ English & maths | 1.8% | – |
| Grade 4+ English & maths | 1.8% | – |
| EBacc average points | 3.03 | – |
| A level points per entry | 38.2 | – |
| town | Gerrards Cross | Winchester |
| region | South East | South East |
| Website | www.stmarysgx.co.uk | www.twyfordschool.com |
The verdict
- •St Mary's School is girls and Twyford 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.
Free academic assessment
Torn between two schools? Start with your child.
Whichever you choose, a free Success Tutoring assessment shows exactly where your child is in English and Maths and how to get ahead before the next school year.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Frequently asked questions
Is St Mary's School better than Twyford 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 St Mary's School and Twyford School?
About 83 km in a straight line, between Gerrards Cross and Winchester in South East.
Which has the better Pupils on roll?
St Mary's School: 391. Twyford School: 391. Number of pupils in the latest school census.
How do St Mary's School and Twyford School rank in South East?
St Mary's School is 486th of 679 and Twyford School is unranked among all-through schools in South East on the 2025 Success Index (England).