The John Warner School
About the school
The John Warner School is an open secondary school in Hertfordshire.
Latest Ofsted inspection
Published Ofsted information, current as at 31 July 2026. Inspection outcomes are not performance rankings.
- Latest inspection
- 11 October 2022
- Published
- 18 December 2022
- Inspection type
- Requires Improvement S5 Reinspection Visit 1
- Latest outcome
- Inadequate
Category of concern: SM
Previous inspection framework
These judgements are retained by Ofsted from an earlier inspection framework.
Overall effectiveness
Inadequate
Quality of education
Requires improvement
Behaviour and attitudes
Inadequate
Personal development
Inadequate
Leadership and management
Inadequate
Safeguarding
No
Early years
Not applicable
Sixth form
Requires improvement
Results and school context
GCSE and key stage 4
Attainment 8
- School
- 40.8
- Hertfordshire
- 50.6
- England
- 46.1
Progress 8
The DfE has not published this measure for 2024/25.
- School
- N/A
- Hertfordshire
- N/A
- England
- N/A
English and maths grade 5+
- School
- 32.50%
- Hertfordshire
- 53.40%
- England
- 45.40%
English and maths grade 4+
- School
- 53.80%
- Hertfordshire
- 71.70%
- England
- 64.80%
EBacc entry
- School
- 13.70%
- Hertfordshire
- 47.00%
- England
- 40.50%
EBacc average point score
- School
- 3.43
- Hertfordshire
- 4.56
- England
- 4.09
A levels and sixth form
Average A-level grade
- School
- C-
Average A-level points
- School
- 26.88
AAB or better
- School
- 0.00%
Pupil context and attendance
DfE context data for 2024/25. These characteristics provide context and are not quality ratings.
Pupils on roll
821
Girls
46.77%
Boys
53.23%
SEN support
12.91%
Education, health and care plan
2.92%
English as an additional language
9.00%
Eligible for free school meals in the past six years
19.29%
Overall absence
11.55
Persistent absence
35.74