Secondary · 中学

Secondary · Independent (中学私立)

ISC-tier fee-paying secondary schools (HMC / GSA / IAPS members) with senior-school age range (≥16). Default order: continuous prestige score = manual tier (Clarendon Nine / HMC flagships) + DfE A-Level + GCSE + pupil count + boarding + destination signal. All 506 ISC schools ranked on one transparent scale. Click 'A-Level AAB %' for pure academic-merit. Excludes embassy / small religious / SEN micro-schools. Currently sorted by Composite score (period 202425). Composite = weighted Ofsted/ISI + A-Level + GCSE + KS2 + prep-destination signals.

Sort by:Ofsted Composite · A-Level Composite · GCSE Composite (all)A-Level AAB %A-Level APS / entry Value-addedGCSE Attainment 8 GCSE Eng+Maths 5+EBacc APS

BoardingAny Boarding Day

GenderAny Mixed (混合)Boys (男校)Girls (女校)

RegionUK-wide London South East South West East of England West Midlands East Midlands North West North East Yorkshire and the Humber

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Showing 1–25 of 83Page 1 of 4EES period: 202425⚠️ Small sample: 83 schools matched all filters

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#	School	Composite score	Type	Region	Ofsted
1	The Perse School	71.7 composite Ofsted13.5 AAB%13.2 VA10.7 Att816.6 EM5+17.7	Independent · Day · 6th	Unknown, East of England	—
2	New Hall School	59.1 composite Ofsted13.5 AAB%5.2 VA10.4 Att814.1 EM5+15.9	Independent · Boarding · 6th	Chelmsford, East of England	—
3	Ipswich School	57.4 composite AAB%7.9 VA14.8 Att815.7 EM5+19.0	Independent · Boarding · 6th	Ipswich, East of England	—
4	Abbot's Hill School	57.3 composite Ofsted18.5 Att818.9 EM5+20.0	Independent · Day	Hemel Hempstead, East of England	—
5	St Francis College	56.2 composite Ofsted13.5 AAB%8.2 VA10.8 Att811.4 EM5+12.3	Independent · Boarding · 6th	Letchworth Garden City, East of England	—
6	OneSchool Global UK Colchester Campus	56.0 composite Ofsted15.6 VA12.7 Att813.4 EM5+14.4	Independent · Day · 6th	Colchester, East of England	—
7	Royal Masonic School for Girls	54.3 composite Ofsted13.5 AAB%2.9 VA11.1 Att813.2 EM5+13.6	Independent · Boarding · 6th	Rickmansworth, East of England	—
8	The Peterborough School	54.2 composite Ofsted13.5 AAB%4.5 VA10.9 Att812.2 EM5+13.2	Independent · Day · 6th	Peterborough, East of England	—
9	Colchester Prep & High School	51.3 composite Ofsted18.5 Att816.7 EM5+16.1	Independent · Day	Colchester, East of England	—
10	Brentwood School	51.0 composite Ofsted13.5 AAB%3.5 VA13.7 Att86.2 EM5+14.1	Independent · Boarding · 6th	Brentwood, East of England	—
11	Cardiff Sixth Form College, Cambridge	50.6 composite AAB%25.1 VA25.4	Independent · Boarding · 6th	Unknown, East of England	—
12	Holmwood House School	50.0 composite Ofsted50.0	Independent · Boarding	Colchester, East of England	—
13	St Christopher School	49.1 composite Ofsted13.5 AAB%2.1 VA10.2 Att811.7 EM5+11.7	Independent · Boarding · 6th	Letchworth Garden City, East of England	—
14	Thorpe Hall School	48.8 composite Ofsted18.5 Att815.0 EM5+15.3	Independent · Day	Unknown, East of England	—
15	St Mary's School for Girls	48.5 composite Att822.9 EM5+25.5	Independent · Day · 6th	Colchester, East of England	—
16	Sancton Wood School	48.3 composite Ofsted18.5 Att814.4 EM5+15.4	Independent · Day	Unknown, East of England	—
17	OneSchool Global UK - Biggleswade Campus	47.1 composite VA10.5 Att816.2 EM5+20.3	Independent · Day · 6th	Biggleswade, East of England	—
18	Gosfield School	46.7 composite Ofsted15.6 VA8.2 Att811.6 EM5+11.2	Independent · Day · 6th	Unknown, East of England	—
19	Sherrardswood School	46.4 composite Ofsted13.5 AAB%3.3 VA10.3 Att810.4 EM5+8.8	Independent · Day · 6th	Welwyn, East of England	—
20	Felixstowe International College	46.2 composite Ofsted23.2 VA22.9	Independent · Boarding · 6th	Felixstowe, East of England	—
21	Wisbech Grammar School	45.7 composite Ofsted13.5 AAB%3.0 VA10.3 Att89.7 EM5+9.1	Independent · Boarding · 6th	Cambridgeshire, East of England	—
22	The King's School	44.7 composite Att820.4 EM5+24.3	Independent · Day	Harpenden, East of England	—
23	St Albans High School for Girls	44.2 composite Ofsted13.5 AAB%10.8 VA10.2 Att89.7 EM5+0.0	Independent · Day · 6th	Unknown, East of England	—
24	St Margaret's School	43.9 composite AAB%3.5 VA12.2 Att813.0 EM5+15.2	Independent · Boarding · 6th	Bushey, East of England	—
25	The Purcell School	43.4 composite Ofsted13.5 AAB%0.5 VA10.1 Att89.5 EM5+9.8	Independent · Boarding · 6th	Unknown, East of England	—

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Source: GIAS school register + Ofsted Management Information — open licence, weekly refresh.

Composite caveats: Independent schools mostly don't submit to DfE EES, so they appear with low completeness scores (or not at all in the composite ranking). The composite mixes A-Level (Y13) and GCSE (Y11) signals — schools without a sixth form get a small completeness penalty even though it isn't a quality issue. For Independent senior schools, the destination-edge rankings (Oxford / Cambridge feeders) are usually more meaningful than this score.

Note on Independent schools: most are inspected by ISI, not Ofsted, so the Ofsted column is empty for many entries. ISI bulk data is not publicly available — sorting by A-Level metrics gives a more meaningful order for this slice.