St John's Preparatory and Senior School
🇬🇧 Official data · 2025Potters Bar, London EN6 5QT · Enfield
#30 of 640 all-through schools in London
#142 of 4,090 nationally
About St John's Preparatory and Senior School
St John's Preparatory and Senior School is a independent all-through located in Potters Bar, in the Enfield local authority of London, England. It caters for Ages 3–19. In 2025 it enrolled 493 students. Fee-paying independent schools. Most do not publish Key Stage results in the government performance tables.
Its Success Index (England) is 94.1 out of 100, placing it in the top 5% of all-through schools in England and 30th of 640 ranked all-through schools in London. Its strongest component is grade 5+ in english & maths (98th percentile), and its weakest is a level points per entry (81th percentile).
Other published figures: pupils on roll 493; capacity filled 88.4%; grade 4+ english & maths 100%; ebacc average points 5.95.
Success Index (England) breakdown
Each component is a percentile against all-through schools across England.
- KS2: reading, writing & maths expected standard (35%)–
- KS2: higher standard (20%)–
- KS2: reading progress (10%)–
- KS2: maths progress (10%)–
- Progress 8 (20%)–
- Attainment 8 (30%)68.1
- Grade 5+ in English & maths (15%)97.5%
- A level points per entry (10%)39.5
- Community advantage (fewer pupils on free school meals) (15%)–
The Success Index (England) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for St John's Preparatory and Senior School by the official sources.
- Pupils on roll
- 493
- Number of pupils in the latest school census.
- Capacity filled
- 88.4%
- Pupils on roll as a share of the school's reported capacity.
- Attainment 8
- 68.1
- Average GCSE points across eight subjects.
- Grade 5+ English & maths
- 97.5%
- Share of pupils with a strong pass in both English and maths GCSE.
- Grade 4+ English & maths
- 100%
- Share of pupils with a standard pass in both English and maths GCSE.
- EBacc average points
- 5.95
- Average point score across the English Baccalaureate subjects.
- A level points per entry
- 39.5
- Average points per A level entry (A* = 60, E = 10).
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Schools near St John's Preparatory and Senior School
Closest schools by straight-line distance, with their Success Index (England).
Oakmere Primary School
Potters Bar · Local authority primary · Ages 3–11
226 students · 1.2 km away
Hadley Wood Primary School
Barnet · Academy primary · Ages 4–11
· 1.9 km away
Stormont School
Potters Bar · Independent primary · Ages 4–11
112 students · 1.9 km away
Ladbrooke Junior Mixed and Infant School
Potters Bar · Local authority primary · Ages 3–11
226 students · 1.9 km away
Northaw Church of England Primary School
Northaw · Local authority primary · Ages 3–11
101 students · 2.5 km away
Little Heath Primary School
Potters Bar · Local authority primary · Ages 3–11
225 students · 2.6 km away
Gracewood Academy
Potters Bar · Academy secondary · Ages 11–18
420 students · 2.6 km away
Pope Paul Catholic Primary School
Potters Bar · Academy primary · Ages 4–11
214 students · 2.8 km away
Lochinver House School
Potters Bar · Independent all-through · Ages 3–13
314 students · 2.9 km away
Mount House School
Barnet · Independent secondary · Ages 11–18
225 students · 3.2 km away
Similar schools
Independent all-through schools in London with a comparable Pupils on roll.
ACS Hillingdon International School
Uxbridge · Independent all-through · Ages 3–19
494 students
Vishnitz Girls School
Hackney · Independent all-through · Ages 2–16
504 students
Kneller Hall School
Twickenham · Independent secondary · Ages 11–18
471 students
Orley Farm School
Harrow · Independent all-through · Ages 4–13
467 students
Kew House
London · Independent secondary · Ages 11–18
467 students
Babington House School
Chislehurst · Independent all-through · Ages 3–18
466 students
Frequently asked questions
Is St John's Preparatory and Senior School a good school?
St John's Preparatory and Senior School has a Success Index (England) of 94.1 out of 100 (Top 5% of all-through schools in England) and ranks #30 of 640 in London. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does St John's Preparatory and Senior School rank in London?
St John's Preparatory and Senior School ranks #30 of 640 all-through schools in London and #142 of 4,090 nationally on the Success Index (England) (2025 data).
How many students attend St John's Preparatory and Senior School?
St John's Preparatory and Senior School had 493 students in 2025.
Is St John's Preparatory and Senior School a primary school or a secondary school?
St John's Preparatory and Senior School is classified as a all-through covering Ages 3–19. It is a independent school.
What other schools are near St John's Preparatory and Senior School?
There are 10 schools within 15 km of St John's Preparatory and Senior School; they are listed on this page with their Success Index (England) and distance, and can be compared side by side.