Blackfen School for Girls
Blackfen Road, Sidcup, DA15 9NU
- Phase
- Secondary
- School type
- Academy converter
- Ages
- 11 to 18
- Gender
- Girls
- Trust
- BLACKFEN SCHOOL FOR GIRLS
- Headteacher
- Ms Carrie Senior
- Admissions policy
- Non-selective
- SEN provision
- SLCN - Speech, language and Communication
- Constituency
- Old Bexley and Sidcup
- Setting
- Urban: Nearer to a major town or city
- Capacity
- 1,500
- Pupils on roll
- 1,324
- URN
- 137965
- Local authority
- Bexley
- Website
- School website
- Telephone
- 02083031887
About this school
Blackfen School for Girls is a girls' secondary academy in Sidcup. It teaches children aged 11 to 18 and has 1,324 pupils on roll.
Ofsted has inspected Blackfen School for Girls, and its latest judgement is set out below. Where the Department for Education has published them, its results and pupil characteristics appear below. Seeing a school for yourself shows what no page can, so arrange a visit before you apply.
Ofsted judgement
Ofsted did not give an overall grade. Between September 2024 and September 2025 inspections graded each area of a school's work without a single overall judgement, ahead of the move to report cards. How Ofsted report cards work
- Quality of education
- Good
- Behaviour and attitudes
- Good
- Personal development
- Good
- Leadership and management
- Good
- Sixth form
- Good
- Safeguarding
- Effective
Exam results
Key stage 4 (GCSEs)
| Measure | 2022/23 | 2023/24 | 2024/25 |
|---|---|---|---|
| Pupils at the end of key stage 4 | 226 | 223 | 228 |
| Attainment 8 score | 46.4 | 46.9 | 44.1 |
| Progress 8 score | -0.11 -0.30 to +0.08 | -0.14 -0.34 to +0.05 | - |
| Grade 5 or above in English and maths | 42% | 46.2% | 38.6% |
| Grade 4 or above in English and maths | 72% | 68.2% | 61% |
| Entered the English Baccalaureate | 18% | 21.5% | 21.9% |
| English Baccalaureate average point score | 3.8 | 3.9 | 3.6 |
Progress 8 is paused nationally for the 2024/25 and 2025/26 school years. Those pupils sat no key stage 2 tests during the Covid pandemic, so there is no starting point to measure progress from. A blank figure here is not missing school data.
Trends over time
How Blackfen School for Girls has moved over recent years against the local and national picture. Every figure is shown in the table beneath its chart.
| Year | This school | Bexley average | England average |
|---|---|---|---|
| 2022/23 | 46.4 | 44 | 39.8 |
| 2023/24 | 46.9 | 44.8 | 39.5 |
| 2024/25 | 44.1 | 42 | 39 |
Department for Education KS4 performance data, published school results.
| Year | This school | England average |
|---|---|---|
| 2022/23 | 10.4% | 6.8% |
| 2023/24 | 10.4% | 6.6% |
| 2024/25 | 9.8% | 6.2% |
Department for Education pupil absence data.
| Year | This school |
|---|---|
| 2022/23 | 1,464 |
| 2023/24 | 1,483 |
| 2024/25 | 1,402 |
School census, spring count each academic year.
How Blackfen School for Girls compares
Blackfen School for Girls ranked 10th of 16 secondary schools in Bexley for Attainment 8 in 2024/25. Its Attainment 8 score was higher than 53% of England secondary schools that published results in 2024/25. Its absence rate was lower than 8% of England schools in 2024/25.
| School | Attainment 8 (2024/25) | Absence | FSM (6 years) | Pupils | Distance |
|---|---|---|---|---|---|
| This school | 44.1 | 9.8% | 19.4% | 1,324 | — |
| Bexley Grammar School | 74.7 | 5% | 4.2% | 1,504 | 0.6 miles |
| Hurstmere School | 42.1 | 7.2% | 16.9% | 893 | 0.7 miles |
| Chislehurst and Sidcup Grammar School | 75.6 | 3.8% | 4.8% | 1,561 | 0.9 miles |
| Townley Grammar School | 75 | 3.8% | 11.4% | 1,669 | 1.2 miles |
| Harris Academy Falconwood | 47.3 | 6.4% | 19.7% | 1,295 | 1.2 miles |
Results reflect each school's cohort as much as its teaching, and free school meals share is context, not a judgement. Small gaps between neighbouring schools are rarely meaningful on their own.
Inspection history
School context
From the 2024/25 school census and absence figures.
- Free school meals (last 6 years)
- 19.44%
- English as an additional language
- 16.6%
- Overall absence
- 9.81%
- Persistent absence
- 27.6%
Location
Nearby schools
-
Bexley Grammar School0.6 miles
Secondary · Welling
-
Hurstmere School0.7 miles
Secondary · Sidcup
-
Chislehurst and Sidcup Grammar School0.9 miles
Secondary · Sidcup
-
Townley Grammar School1.2 miles
Secondary · Bexleyheath
-
Harris Academy Falconwood1.2 miles
Secondary · Welling
Other schools in Sidcup
Blackfen School for Girls ranks 2nd of the 5 ranked secondary schools in Sidcup.
- Chislehurst and Sidcup Grammar School Secondary
- Cleeve Park School Secondary
- Hurstmere School Secondary
- Kemnal Technology College Secondary
- Birkbeck Primary School Primary
- Burnt Oak Junior School Primary
- Chatsworth Infant School Primary
- Days Lane Primary School Primary
- Holy Trinity Lamorbey Church of England School Primary
- Hope Community School Primary
- Longlands Primary School Primary
- Orchard Primary School Primary
Common questions
- What ages does Blackfen School for Girls teach?
- Blackfen School for Girls teaches children aged 11 to 18. It is a secondary school in Sidcup.
- Who is the headteacher of Blackfen School for Girls?
- The headteacher of Blackfen School for Girls is Ms Carrie Senior, as recorded in the Department for Education's register of schools.
- Has Blackfen School for Girls been inspected?
- Ofsted has inspected Blackfen School for Girls, and its latest judgement is set out in the inspection section on this page, with the framework and the date it was made.
- How many pupils are at Blackfen School for Girls?
- Blackfen School for Girls has 1,324 pupils on roll, teaching children aged 11 to 18.
- Is Blackfen School for Girls full?
- Blackfen School for Girls has capacity for 1,500 pupils and 1,324 on roll (88%), so it has space against its published capacity. Places are allocated through the local authority's admissions process, so capacity alone does not tell you whether a place is available.
- Is Blackfen School for Girls a faith school?
- No. Blackfen School for Girls has no designated religious character.
- Is Blackfen School for Girls a selective school?
- No. Blackfen School for Girls is recorded as non-selective in the schools register.
- Is Blackfen School for Girls part of an academy trust?
- Blackfen School for Girls is part of BLACKFEN SCHOOL FOR GIRLS. Schools in a trust or federation share leadership and governance, but each keeps its own inspection record and results.
- What SEN provision does Blackfen School for Girls have?
- The schools register lists Blackfen School for Girls's special educational needs provision as: SLCN - Speech, language and Communication. Contact the school to discuss how it would support a particular child.
- How have Blackfen School for Girls's results changed over recent years?
- Its Attainment 8 score was 46.4 in 2022/23 and 44.1 in 2024/25. The year-by-year figures, alongside local and national averages, are charted in the trends section on this page.
- How does Blackfen School for Girls compare with other schools in Bexley?
- Blackfen School for Girls ranked 10th of 16 secondary schools in Bexley for Attainment 8. Its Attainment 8 score was higher than 53% of England secondary schools that published results in 2024/25. Its absence rate was lower than 8% of England schools in 2024/25. Results reflect each cohort as well as the school, so treat rankings as a starting point.
- What is Blackfen School for Girls's absence rate?
- Blackfen School for Girls's overall absence rate is 9.8% in the latest published census, above the England average of 6.2%.
- What are Blackfen School for Girls's exam results?
- Where the Department for Education has published them, Blackfen School for Girls's key stage results are shown in the results section on this page, with the last three years so you can see the trend rather than a single year.
School details come from the Department for Education's Get Information About Schools register. Inspection outcomes come from Ofsted, and exam results from the Department for Education's school performance service. This page was last updated on 1 July 2026.