The Essex CSSE test is the 11+ exam used by ten selective and bilateral grammar schools across Colchester, Chelmsford and Southend. Unlike Kent or GL Assessment areas, it's written entirely by the schools' own consortium — the Consortium of Selective Schools in Essex — not by GL Assessment or CEM.
What is CSSE?
CSSE stands for the Consortium of Selective Schools in Essex — and the name is precise: it is a consortium of the ten schools themselves, not a commercial test publisher. Its member schools are:
- Colchester: Colchester County High School for Girls, Colchester Royal Grammar School
- Chelmsford: King Edward VI Grammar School (KEGS)
- Southend: Southend High School for Boys, Southend High School for Girls, Westcliff High School for Boys, Westcliff High School for Girls, Shoeburyness High School
- Catholic bilateral schools: St Bernard's High School (girls), St Thomas More High School (boys)
Because CSSE writes and marks its own papers rather than buying an off-the-shelf test, it's genuinely distinct from GL Assessment (used in areas like Buckinghamshire) and from CEM, which — despite older articles still describing it as a Durham University unit — has been part of Cambridge Assessment / Cambridge University Press & Assessment since 2019. Essex uses neither: CSSE is its own thing entirely.
What does the CSSE test cover?
The CSSE exam is two papers, sat on the same day:
| Paper | Content | Length |
|---|---|---|
| English | Reading comprehension and continuous writing | 60 minutes, plus 10 minutes' reading time |
| Mathematics | Based on the KS2 curriculum, through to Year 5 content | 60 minutes |
One change worth knowing if you've seen older CSSE guidance: as of September 2024, the English paper no longer includes a separate Applied Reasoning section, so preparation resources written before that date may describe a paper that no longer matches the current format.
The 2026 CSSE cycle: registration, test date and results
For September 2027 entry, the CSSE timetable runs:
- Registration: opens 12 May 2026, closes 19 June 2026 — a comparatively short window, so it's worth diarising early
- Test date: Saturday 19 September 2026, with a reserve date of 29 September 2026 for children unable to sit on the main day
- Results: released 12 October 2026
As with any admissions timetable, treat these as the current cycle's dates rather than a fixed annual pattern, and confirm directly with CSSE or your target school ahead of registering.
What counts as a qualifying score under CSSE?
CSSE results are reported as a standardised score, not a raw mark out of 100 — the score is adjusted for a child's exact age in months, so it isn't simply "number of correct answers." For the 2026 cycle, the minimum standardised score to be considered eligible is 303.
It's worth being precise about what that number means: 303 is a floor for eligibility, not a guarantee of a place. Because Essex's grammar and bilateral schools are heavily oversubscribed, competitive scores at popular schools typically run well above the minimum — into the 310–320+ range. CSSE itself is explicit that its office "deals with examination administration only": it has no role in deciding who gets offered a place. Each individual school applies its own admissions criteria — which might include catchment, siblings or distance — to decide who among the qualifying candidates is actually offered a place. (For how standardised scores and qualifying thresholds work across different areas, see our companion piece on how grammar school pass marks work.)
FAQ
What is CSSE and how is it different from GL Assessment or CEM?
CSSE (Consortium of Selective Schools in Essex) is a group of the ten Essex selective and bilateral schools themselves, and it writes its own bespoke English and maths papers rather than using GL Assessment or CEM-linked tests. This makes Essex's 11+ format genuinely different from neighbouring counties that buy in a commercial provider's test.
What score do you need to pass the Essex 11+?
The minimum standardised score for eligibility is 303 for the 2026 cycle, but this is only a floor. Because CSSE schools are oversubscribed, realistic competitive scores at the most popular schools tend to sit noticeably higher, often 310 or above.
When is the Essex CSSE test in 2026?
The main test date for the 2026 cycle (September 2027 entry) is Saturday 19 September 2026, with a reserve sitting on 29 September 2026. Registration runs from 12 May to 19 June 2026, and results are released around 12 October 2026.
Do all Essex grammar schools use the same CSSE test?
Yes — all ten CSSE member schools (across Colchester, Chelmsford and Southend, including the Catholic bilateral schools) use the same shared English and maths papers set by the consortium. However, each school still applies its own admissions criteria on top of the shared test score to decide who is actually offered a place.
Whichever score threshold your child is aiming for, steady KS2 maths and reading comprehension practice makes the biggest difference — see how aitutors.me can help build that foundation.