| Borough | City of London |
| Postcode | EC2Y 8BB |
| Phase | Secondary |
| School type | Other independent school |
| Gender | Girls |
| Age range | 10–18 |
| Sixth form | Has a sixth form |
| Admissions | Selective |
| Religious character | N/A |
| Overall rating | Not yet rated |
| Attainment 8 score | 49.7 |
| Grade 5+ English & Maths | 0.0% |
| Grade 4+ English & Maths | 0.0% |
KS4 data from DfE 2024/25 school performance tables. Attainment 8 measures average grade across 8 GCSE subjects (national average: 46.4). Grade 5+ is a strong pass in both English and Maths. Figures may occasionally exceed 100% due to mid-year cohort changes in DfE reporting.
| Headteacher | Mrs Jenny Brown |
| Phone | 02078475500 |
| Website | http://www.clsg.org.uk |
| Pupil deprivation | Low pupil deprivation |
| Crime level | Above average crime |
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