Blackfen School for Girls
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Blackfen School for Girls is a converter academy in Sidcup for girls aged 11 to 18. It has 1,324 pupils and room for 1,500. About 16 in every 100 pupils come from a low-income family, far fewer than at most schools in England. We give it 33 out of 100. That puts it below schools like it, ahead of 2% of the 50 schools most like it. Ofsted's last grade was inspected 2025, no overall grade.
Blackfen Road, Sidcup, DA15 9NU020 8303 1887blackfenschoolforgirls.co.ukMs Carrie Senior headteacherAll details
What Ofsted found
Ofsted's last full inspection was on 11 March 2025, back when it gave schools one overall grade. Read the report on Ofsted's website.
Not judged Between September 2024 and November 2025, Ofsted graded each area but stopped giving one overall word.
Earlier inspections (1)
| Date | Type | Outcome |
|---|---|---|
| 18 December 2019 | Ungraded | School remains Good |
Results
GCSE results, summer 2025
228 pupils sat their GCSEs. Here is how they did against every state secondary in England.
All GCSE measures, year by year
| Measure | 2025 | 2024 | 2023 | 2022 | 2019 | 2018 | Bexley | England |
|---|---|---|---|---|---|---|---|---|
| Pupils at the end of Year 11 | 228 | 223 | 226 | 215 | 201 | 202 | – | – |
| Average GCSE scoreAttainment 8 | 44.1 | 46.9 | 46.4 | 47.8 | 46.2 | 47.6 | 51.0 | 46.8 |
| Progress from age 11Progress 8 | – | -0.14 | -0.11 | -0.23 | +0.03 | +0.02 | – | – |
| Strong pass in English and mathsGrade 5+ in English and maths | 39% | 46% | 42% | 41% | 36% | 42% | 54% | 46% |
| Standard pass in English and mathsGrade 4+ in English and maths | 61% | 68% | 72% | 69% | 65% | 65% | 71% | 66% |
| Core subjects scoreEBacc average point score | 3.63 | 3.89 | 3.81 | 3.94 | 3.86 | 3.91 | 4.53 | 4.15 |
| Taking the core subjectsEBacc entry | 22% | 22% | 18% | 18% | 40% | 35% | 41% | 41% |
| Average GCSE score: low-income pupilsAttainment 8, disadvantaged | 27.0 | 40.2 | 29.8 | 39.5 | 42.2 | 37.7 | – | – |
| Average GCSE score: other pupilsAttainment 8, non-disadvantaged | 46.6 | 47.9 | 49.4 | 49.4 | 47.2 | 49.3 | – | – |
| Average GCSE score: pupils who started behindAttainment 8, low prior attainers | – | 26.0 | 24.8 | 32.4 | 27.5 | 24.9 | – | – |
| Average GCSE score: pupils who started aheadAttainment 8, high prior attainers | – | 60.5 | 60.6 | 60.3 | 55.1 | 61.0 | – | – |
Subjects
Results came out for 22 GCSE subjects in 2025. Each figure is the share of pupils who got a grade 5 or better, next to the average for state secondaries in England.
Strongest subjects
Subjects that did worse than the England average: Economics (41% here, 70% across England), Dance (48% here, 58% across England), Mathematics (44% here, 53% across England).
The small number is how many pupils sat each subject. Subjects with fewer than six pupils aren't published.
Every subject against England, 2025
| Subject | Entries | Grades 9 to 7 | Grades 9 to 5 | Grades 9 to 4 | England 9 to 5 | Rank in England |
|---|---|---|---|---|---|---|
| Mathematics | 222 | 13% | 44% | 68% | 53% | 2,156 of 3,211 |
| English Language | 220 | 13% | 51% | 70% | 54% | 1,716 of 3,210 |
| English Literature | 210 | 13% | 58% | 75% | 58% | 1,439 of 3,202 |
| Combined Science | 191 | 5% | 35% | 55% | 36% | 1,513 of 3,084 |
| Social Studies | 143 | 19% | 57% | 73% | 54% | 443 of 1,043 |
| Art and Design | 124 | 9% | 61% | 84% | 58% | 1,317 of 2,818 |
| Geography | 105 | 19% | 51% | 66% | 51% | 1,309 of 3,116 |
| History | 79 | 22% | 43% | 54% | 52% | 2,041 of 3,126 |
| Business | 78 | 10% | 45% | 59% | 51% | 1,010 of 1,806 |
| Religious Studies | 66 | 33% | 74% | 80% | 60% | 497 of 1,825 |
| Food Preparation & Nutrition | 45 | 7% | 44% | 69% | 52% | 677 of 1,098 |
| Spanish | 39 | 33% | 51% | 72% | 54% | 1,106 of 1,941 |
| Economics | 32 | 22% | 41% | 59% | 70% | 123 of 142 |
| French | 30 | 50% | 70% | 83% | 60% | 712 of 1,974 |
| Dance | 27 | 26% | 48% | 78% | 58% | 57 of 74 |
| Drama | 26 | 4% | 65% | 81% | 60% | 394 of 844 |
| Statistics | 24 | 63% | 92% | 100% | 51% | 97 of 375 |
| Physics | 22 | 36% | 96% | 100% | 82% | 762 of 2,546 |
| Biology | 22 | 36% | 96% | 100% | 82% | 741 of 2,570 |
| Chemistry | 22 | 27% | 96% | 100% | 81% | 785 of 2,537 |
| Music | 19 | 11% | 58% | 74% | 61% | – |
| Other Modern Languages | 7 | 0% | 0% | 0% | 49% | – |
In combined science each pupil gets two grades and we count the lower one. Rankings only include state secondaries where 20 or more pupils sat the subject.
A level and sixth-form results, 2025
199 students finished sixth-form courses.
All sixth-form measures, year by year
| Measure | 2025 | 2024 | 2023 | 2022 | 2019 | 2018 |
|---|---|---|---|---|---|---|
| Students | 199 | 167 | 193 | 209 | 333 | 315 |
| Average A level points per entryA level APS per entry | 34.00 | 31.65 | 30.91 | 37.88 | 28.27 | 29.48 |
| Average A level grade | C+ | C | C | B- | C- | C |
| Best three A levelsBest 3 A levels APS | 34.68 | 32.92 | 32.40 | 38.73 | 28.42 | 24.49 |
| AAB or better in subjects universities likeAAB+ in two facilitating subjects | 3% | 3% | 4% | 11% | 0% | 3% |
| A level progressA level value added | +0.19 | +0.18 | – | – | -0.16 | +0.02 |
| Applied general courses: points per entry | 29.06 | 28.47 | 30.50 | 30.14 | – | – |
| Stayed and finishedRetained and assessed | 96% | 96% | 97% | 99% | 84% | 83% |
A level subjects
15 A level subjects had results in 2025. Each figure is the share of students who got an A* to B, next to the average for state sixth forms in England. When only a handful of students take a subject, its figures jump around from year to year.
Strongest A levels
Every A level subject against England, 2025
A levels only. BTECs, T levels and other courses are in the table above. Subjects with fewer than five students aren't published.
Does every child do well here?
A good school does well by every child, not just on average. Each row compares two groups of pupils here. The grey marks show the same two groups across England. None of the gaps is smaller than the gap across England. When a group has fewer than about ten pupils, its figures jump around a lot from year to year.
At GCSE, 2025
Low-income means the child has had free school meals at some point in the last six years. A group's figure isn't published when it has fewer than six pupils.
Getting a place
Open to all. There is no entrance test.
About 86 places were empty, so most families who apply get in, though a popular year group can still fill up. Pupil numbers have fallen by 6% since 2021/22, so places are getting easier to find.
Each council publishes its own figures on how many families applied and how far away the last child to get a place lived. We are adding councils one at a time. If you have a link to Bexley council's admissions booklet, send it to us.
Who goes here
Who a school teaches matters. That is why our score compares it with schools that take in a similar mix of children, not with every school in the country.
Specialist SEND provision. Resourced provision (extra staff and funding within a mainstream school) with 28 pupils, for speech, language and communication.
To get a place in the unit or resourced provision, a child normally needs an education, health and care plan (EHCP) that names the school. Other schools in Bexley with speech, language and communication provision.
The most common needs among pupils getting extra support: Autistic spectrum disorder (71), Specific learning difficulty (48), language and communications needs (32), emotional and mental health (30), SEN support but no specialist assessment of type of need (17), Vision impairment (6).
How the mix of pupils has changed
| Census | 2026 | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|---|
| Pupils on roll | 1,324 | 1,402 | 1,483 | 1,464 | 1,500 | 1,461 |
| Pupils from low-income familiesFree school meals | 14% | 13% | 11% | 11% | 10% | 8% |
| Pupils learning EnglishEnglish as an additional language | 18% | 17% | 16% | 16% | 15% | 14% |
| Pupils getting extra supportSEN support | – | 6% | 4% | 6% | 13% | 12% |
| Pupils with an EHC planEducation, health and care plans | – | 4% | 3% | 3% | 2% | 2% |
Attendance and behaviour
In 2024/25 pupils were in school 90.2% of the time. Across similar schools in England it was 91.4%.
Attendance year by year
| Measure | 2024/25 | 2023/24 | 2022/23 | 2021/22 | 2020/21 | 2018/19 | England |
|---|---|---|---|---|---|---|---|
| Sessions missedOverall absence | 9.8% | 10.4% | 10.4% | 9.6% | 4.8% | 4.7% | 8.6% |
| Missed with permissionAuthorised absence | 7.6% | 6.9% | 8.2% | 8.2% | 3.7% | 3.8% | – |
| Missed without permissionUnauthorised absence | 2.3% | 3.6% | 2.2% | 1.4% | 1.1% | 0.9% | – |
| Pupils missing a lot of schoolPersistent absence | 27.6% | 31.1% | 33.5% | 32.2% | 12.3% | 10.1% | 23.9% |
| SuspensionsSuspension rate | 13.6 | 18.8 | 19.4 | 9.0 | 6.9 | – | – |
| Permanent exclusionsPermanent exclusions | 1 | 6 | 2 | 0 | 5 | – | – |
What pupils do next
After GCSEs
Where the 226 pupils who left in 2022/23 were a year later.
Among pupils from low-income families it was 83%, compared with 97% for everyone else.
Earlier years
| Destination | 2022/23 leavers | 2021/22 leavers | 2020/21 leavers | 2019/20 leavers |
|---|---|---|---|---|
| Still in education, work or training | 95% | 95% | 97% | 96% |
| Education | 91% | 90% | 92% | 89% |
| Apprenticeship | 4% | 2% | 3% | 5% |
| Work | – | 3% | 1% | 1% |
| Not in education, work or training | 3% | 4% | 2% | 3% |
After sixth form
Where the 174 pupils who left in 2022/23 were a year later.
Among pupils from low-income families it was 73%, compared with 82% for everyone else.
Where the ones heading for university went
Among students from low-income families, 71% went on to degree-level study or training and 6% to a top-third university.
Earlier years
| Destination | 2022/23 leavers | 2021/22 leavers | 2020/21 leavers | 2019/20 leavers |
|---|---|---|---|---|
| Still in education, work or training | 82% | 87% | 93% | – |
| Education | 42% | 46% | 44% | – |
| Apprenticeship | 8% | 13% | 16% | 4% |
| Work | 32% | 29% | 33% | – |
| Not in education, work or training | 9% | 11% | 5% | – |
Staff and money
From the government's count of school staff in November 2025 and the school's published accounts.
Money
From the academy accounts return, year to August 2025. The per-pupil figures are compared with other secondary schools in England that report their accounts the same way.
Reserves are the money left over at the end of the year, kept back for emergencies and big projects. Being in the red year after year is a warning sign. Very large reserves can mean money sitting in the bank instead of being spent on today's pupils. Academy figures are rounded to the nearest £1,000 and include a share of any money the trust holds centrally.
The area around the school
Crime figures come from police.uk. The police record each crime at the nearest of a fixed set of map points rather than the exact spot, so “within 500 m” is only rough. House prices are from HM Land Registry sales nearby over the last two years.
Nearby schools
The closest secondary schools, nearest first. Hover over a row to see it on the map.
| School | Type | Distance | Pupils | Ofsted | Score | |
|---|---|---|---|---|---|---|
| Bexley Grammar School | Academy (grammar) | 950 m | 1,504 | Outstanding 2022 | 97 | Compare |
| Hurstmere School | Academy | 0.7 miles | 893 | Requires improvement 2022 | 5 | Compare |
| Chislehurst and Sidcup Grammar School | Academy (grammar) | 0.9 miles | 1,561 | Good 2022 | 96 | Compare |
| Townley Grammar School | Academy (grammar) | 1.2 miles | 1,669 | Outstanding 2023 | 98 | Compare |
| Harris Academy Falconwood | Academy | 1.2 miles | 1,295 | Good 2019 | 59 | Compare |
| Welling School | Academy | 1.3 miles | 1,084 | Report card 2026 | 3 | Compare |
| Cleeve Park School | Academy | 1.4 miles | 994 | Good 2024 | 34 | Compare |
| Leigh Stationers' Academy | Academy | 1.6 miles | 1,764 | Good 2023 | 69 | Compare |
Compared with schools like it
Our score compares Blackfen School for Girls with the 48 schools in England whose pupils are most like its own. We match on family income, how many children are learning English, special needs, the neighbourhood, the size of the school and how it admits pupils. Those 48 schools are dotted all over the country, so we don't list them. What matters is where this school sits among them.
Nearby schools with a similar mix of pupils that score higher
Of those 48 schools, these are within 25 km and score at least five points more than Blackfen School for Girls, nearest first. A school with the same kind of pupils and a higher score is the fairest sign that it gets more out of them.
| School | Type | Distance | Pupils | Ofsted | Score | |
|---|---|---|---|---|---|---|
| St Catherine's Catholic School | Academy | 2.0 miles | 1,021 | Good 2022 | 85 | Compare |
| Chislehurst School for Girls | Academy | 2.3 miles | 1,227 | Good 2023 | 70 | Compare |
| Eltham Hill School | Council | 2.9 miles | 1,350 | Good 2024 | 69 | Compare |
| Woolwich Polytechnic School for Girls | Free school | 3.8 miles | 1,120 | Good 2023 | 59 | Compare |
| Bullers Wood School | Academy | 3.9 miles | 1,555 | Good 2024 | 78 | Compare |
| Dartford Science & Technology College | Foundation | 4.0 miles | 857 | Report card 2026 | 52 | Compare |
| Langley Park School for Girls | Academy | 7.0 miles | 1,714 | Good 2022 | 76 | Compare |
| Harris Girls Academy Bromley | Academy | 7.0 miles | 1,117 | Outstanding 2024 | 95 | Compare |
How the score was worked out
The score is out of 100. A 33 means that once everything below is added up, this school comes out ahead of 33% of secondary schools in England. Results bounce around from year to year, especially in small schools, so we also show a likely range: 25 to 44. That range is wide enough that the school could sit in the next band, so take the band as a rough guide rather than a verdict. Every part is judged against schools with a similar mix of pupils. For small schools we pull each part towards the group average, so one unusual year can't swing the score too far.
| What we looked at | How much it counts | Against schools like it | Effect on the score | Based on |
|---|---|---|---|---|
| Results over three years | 20% | in line | 0.00 | 2025, 2024 and 2023 results; 228 pupils |
| Ofsted inspection | 20% | in line | +0.02 | Ofsted grade, 1.5 years old |
| Progress pupils make | 20% | in line | -0.01 | DfE progress measure; 228 pupils |
| Direction of travel over five years | 10% | below | -0.06 | results and attendance falling year on year |
| Attendance and behaviour | 10% | in line | -0.03 | 2024/25; 1,145 pupils |
| Results, allowing for the mix of pupils | 10% | well below | -0.23 | Attainment relative to schools with a similar intake; 228 pupils |
| What pupils do next | 5% | above | +0.04 | 226 pupils |
| What parents say | 0% | no data | – |
Worked out on 13 September 2026 (method v1). Read how the score works, including every weight and the checks we run. Think a number is wrong? Tell us.
Questions parents ask
Is Blackfen School for Girls a good school?
The figures are weak. Blackfen School for Girls scores 33 out of 100. That is below schools that take in a similar mix of pupils, and ahead of 2% of the 50 schools most like it in England. The score could fairly be anywhere from 25 to 44, so a few points either way between schools doesn't mean much.
What is Blackfen School for Girls's Ofsted rating?
Ofsted rated Blackfen School for Girls not judged at its last full inspection on 11 March 2025.
How good are Blackfen School for Girls's GCSE results?
In summer 2025, 39% of pupils got a grade 5 or better in both English and maths. Across England it was 46%. Its Attainment 8 score, which is the average grade across a pupil's best eight subjects times ten, was 44.1, against 46.8 for England. In each subject, pupils here finished a little behind children across England who started secondary school at the same level.
How many pupils does Blackfen School for Girls have?
1,324 pupils aged 11 to 18 were on the roll in January 2026. It has 1,500 places, so it is 88% full. It is a girls' school.
Is Blackfen School for Girls oversubscribed?
Probably not. 86 places were empty in 2024/25 (6% of the total), so most families who apply get a place.
What is attendance like at Blackfen School for Girls?
Pupils were in school 90.2% of the time in 2024/25. Similar schools in England managed 91.4%. 28% of pupils missed at least a tenth of the year.
How big are the classes at Blackfen School for Girls?
The average class had 23.0 pupils in January 2026. Across England it was 22.8. 2% of classes had more than 30 pupils.
Does Blackfen School for Girls have specialist SEND provision?
Yes. It has resourced provision (extra staff and funding within a mainstream school) for speech, language and communication. To get a place there, a child normally needs an education, health and care plan (EHCP) that names the school.
Does Blackfen School for Girls have a sixth form?
Yes. The average A level grade in 2025 was C+. 15 A level subjects had results in 2025; the full list is in the results section.
These answers come straight from the figures on this page and update when new data comes out.
Contact and details
- Address
- Blackfen Road, Sidcup, DA15 9NU
- Telephone
- 020 8303 1887
- Website
- www.blackfenschoolforgirls.co.uk
- Headteacher
- Ms Carrie Senior
- Type of school
- Converter academy (Academy converter, academies)
- Phase
- Secondary school, ages 11-18, with sixth form
- Gender
- Girls
- Single-academy trust
- Blackfen School for Girls (1 schools)
- Local authority
- Bexley
- Ward
- Blendon & Penhill
- Constituency
- Old Bexley and Sidcup
- Setting
- Urban: Nearer to a major town or city
- Opened
- 1 April 2012 (academy converter)
- URN
- 137965 · LAESTAB 3034008 · UKPRN 10036933
- Formerly
- Blackfen School for Girls
Recent changes
- New KS4 results for 2024/25
Where these figures come from
- School details: Department for Education, Get Information About Schools, refreshed daily (this page rebuilt 13 September 2026).
- Inspections: Ofsted management information, monthly; latest publication in our data 27 August 2026.
- GCSE results: DfE key stage 4 performance tables, 2024/25 final.
- Attendance: DfE pupil absence in schools in England, 2024/25 full year.
- Pupil characteristics: DfE school census, January 2026.
- Staff: DfE school workforce census, November 2025.
- Class sizes: DfE schools, pupils and their characteristics, January 2026.
- Pupil premium: DfE allocations and conditions of grant, 2026 to 2027.
- Money: DfE financial benchmarking and insights tool, academy accounts return 2024/25.
- A level subjects: DfE A level and other 16 to 18 results, subject entries and grades, 2024/25.
- Neighbourhood: police.uk street-level crime, HM Land Registry price paid data, NaPTAN bus stops, English Indices of Deprivation 2025.
- All under the Open Government Licence v3.0. Full list and update calendar.