SecondaryAcademyOpen

The Costello School

Crossborough Hill, Basingstoke, Hampshire, RG21 4AL · URN 138287

Public data summary

6.5

out of 10 · 19 data sources

Coverage 56% · Solid

Record

At a glance

Ofsted: Good
Pupils: 594
Age range: 11–16
Gender: Mixed
Capacity: 1,120
Local authority: Hampshire

Outcomes

Published performance

GCSE Progress 8: -0.03
GCSE Attainment 8: 46.3

Context

Attendance and community

Overall absence: 8.9%
Persistent absence: 24.6%
Free school meals: 11.5%
SEN support: 17.3%
English additional language: 14.8%

Resources

Workforce and funding

Pupil–teacher ratio: 8.4:1
Average class size: 25.8
Staff turnover: 25.7%

Official-data model

Data dimensions

Achievement

7.5

4 contributing signals

Progress

6.7

2 contributing signals

Attendance

5.3

6 contributing signals

Resources

5.7

4 contributing signals

Equity

7.0

3 contributing signals

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School contact

Official website

01256321263

School records are retained from official public datasets and managed through the Y School admin. This atlas is a supporting layer, not the current Y School product. Last refreshed 02/06/2026.