Joshua Mangas
School Intel

St Mary's and St John's CofE School

  • All-through
  • Academy converter
  • Ages 3 to 18
  • Church of England

URN 151504 · Barnet · WREN ACADEMIES TRUST

In Barnet

Inspection

Ofsted management information, as at 30 September 2026.

Latest graded inspection

28 February 2024

Overall effectiveness
Good

Quality of education
Good
Behaviour and attitudes
Good
Personal development
Good
Leadership and management
Good
Early years provision
Good
Sixth form provision
Good
Safeguarding is effective
Yes

This inspection was of the predecessor school, before it converted or reopened under its current URN.

Full inspection (section 5)

Under the earlier framework, inspections gave an overall effectiveness grade.

Read the reports on Ofsted’s website. Source: Ofsted, State-funded school inspections and outcomes: management information.

Key stage 4 results

Against Barnet and England, secondary schools.

Attainment 8

2025/26 (provisional)

54.5

Barnet
57.6
England
47.4

7.1 higher than England.

The average of pupils' points across eight GCSE-level qualifications, with English and maths counted twice. Source: Department for Education, Explore Education Statistics, Key stage 4 performance, 2025/26.

English and maths: grade 4 or above

2025/26 (provisional)

80%

Barnet
79%
England
66%

14 percentage points higher than England.

Pupils at the end of key stage 4 with grade 4 or above in both English and maths. Source: Department for Education, Explore Education Statistics, Key stage 4 performance, 2025/26.

English and maths: grade 5 or above

2025/26 (provisional)

61%

Barnet
65%
England
48%

13 percentage points higher than England.

Pupils at the end of key stage 4 with grade 5 or above in both English and maths. Source: Department for Education, Explore Education Statistics, Key stage 4 performance, 2025/26.

Teachers

Against Barnet and England, secondary schools.

Pupils per qualified teacher

2025/26

18.3

Barnet
16.6
England
17.3

1.0 higher than England.

Full-time equivalent pupils for each full-time equivalent qualified teacher. Source: Department for Education, Explore Education Statistics, School workforce in England, 2025/26.

Teacher sickness absence

2024/25

Not publishedNot published for this school

Barnet
4.1 days
England
5.0 days

Compared with all state-funded schools: DfE publishes this measure for all schools, not by phase.

Days lost to sickness absence in the school year, averaged across all teachers. Source: Department for Education, Explore Education Statistics, School workforce in England, 2024/25.

Finance

Academies report their accounts as part of their trust, so DfE publishes no school-level balance for this school. The trust’s figures are in DfE’s Financial Benchmarking and Insights Tool.

See this school in the Financial Benchmarking and Insights Tool

About the school

Pupils on roll
1,651
Capacity
1,780
Type
Academy converter
Phase
All-through
Age range
3 to 18
Sixth form
Has a sixth form
Admissions
Non-selective
Gender
Mixed
Religious character
Church of England
Trust
WREN ACADEMIES TRUST
Opened
1 September 2025
Setting
Urban: Nearer to a major town or city
Constituency
Hendon
Deprivation of the area (IDACI)
Decile 5 of 10 (1 is the most deprived tenth of neighbourhoods)

Address: Bennett House, Sunningfields Road, London, NW4 4QR

Website: www.smsj.barnet.sch.uk

Telephone: 02082020026

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Sources and corrections

Every figure on this page names its source and period. This release was built on 20 October 2026.

Spotted something wrong? Report a correction with the school’s URN (151504). Fixes go out in the next weekly release.

St Mary's and St John's CofE School, URN 151504. https://joshuamangas.com/intel/school/151504/. Data release 20 October 2026. Contains public sector information licensed under the Open Government Licence v3.0.