Inside Westminster Under School in 2026: A Parent’s 11+ Guide for 2027 Entry
So how do you actually get into Westminster?
It is the question I am asked most often, by parents whose children are in Year 4 or Year 5, at the kitchen table at 9pm on a Tuesday. They have usually spent two hours on Mumsnet and another forty minutes on a tutoring blog, and are no clearer for it.
Two things to know up front. First, 2026 is one of the biggest changes in Westminster’s almost 500-year history — girls join Year 7 for the first time at the 11+ entry point. The Chapter House facility has been built to support this. Westminster School itself becomes fully co-educational in Year 9 from 2028. Second, the school’s own admissions language is unusually direct. They publicly recommend that families do not cram or specifically tutor children, because that risks losing the freshness, spontaneity, and eagerness to learn the school is looking for. We agree with the spirit of this. Our work prepares children for the format and the rigour while protecting the curiosity Westminster wants to see.
This guide is current as of May 2026, for parents whose children will sit ISEB in autumn 2026 and the January 2027 assessment day for September 2027 entry. By the end you should be calmer than you started.
Inside Westminster in 2026
Westminster is one of the most historically significant schools in the country, and 2026 marks one of the biggest changes in its almost 500-year history: girls join Year 7 for the first time at the 11+ entry point. The Under School site is expanding to include Chapter House, a new building designed for girls and boys equally, and Westminster School itself becomes fully co-educational in Year 9 from 2028.
For parents new to Westminster, the structure can be confusing. At 11+, children enter Westminster Under School. They spend two years there, in Years 7 and 8, and then move automatically to Westminster School in Year 9 at 13+, without sitting another entrance test. The 11+ entry point is the largest single intake into the Westminster system.
The school’s own admissions framing is unusually direct: they are looking for natural ability, and they strongly recommend that families do not cram or specifically tutor children. The risk, in their words, is losing the freshness, spontaneity, and eagerness to learn that they want to see. The right preparation prepares children for the format and the rigour without flattening the curiosity.
What parents tell us they love
Westminster’s almost 500-year history paired with modern openness. Automatic progression to Westminster School at 13+. Central London location. The school’s deliberate avoidance of over-tutored children. The new Chapter House facility from 2026.
What parents tell us they worry about
The co-ed transition at 11+ from 2026 changes the applicant pool. Westminster explicitly says “do not over-tutor”. The assessment day is informal-feeling but high-stakes. The ISEB pre-test must be strong across all four sections. Progress at Under School must be maintained for 13+ progression.
A note from Reena. Visit Walk Vincent Square. Watch children move between lessons. The right school is the one your child will thrive in for seven years, not the one with the most prestigious name on the gates. And for the first co-ed year specifically — go and see the new Chapter House facility.
The admissions process for September 2027 entry
Westminster runs a two-stage process. Stage 1 is the ISEB Common Pre-Test in autumn. Around 100 children are invited to a January assessment day at the Under School, with additional written papers in Maths and English. The school describes the assessment day as informal and friendly, with teachers on hand to support and prompt during the tasks. Verified against westminster.org.uk in May 2026.
Key dates for September 2027 entry
Date
Day
What happens
1 September 2025
—
Registration opened for September 2027 entry
30 September 2026
—
Registration closes for September 2027 entry
Autumn 2026
—
ISEB Common Pre-Test
January 2027
—
Assessment day at Westminster Under School
February 2027
—
Offer letters issued
WHAT TO DO NOW: Diary every date above. The 30 September deadline is unforgiving. Book an open day or School in Action visit early — Westminster is not a school to choose without seeing. Bursary applications run in parallel — start the conversation before the registration deadline if you need support.
The papers and the assessment in detail
What follows is a parent-friendly map of each stage, with the named techniques we teach.
No real exam questions appear in this guide. Every example is written by Academic Success in the style of the paper.
Stage 1: ISEB Common Pre-Test (autumn 2026)
An online adaptive test in English, Maths, Verbal Reasoning, and Non-Verbal Reasoning. Taken at the child’s current school or at Westminster Under. Adaptive means the test adjusts difficulty based on performance — strong answers lead to harder questions, weaker answers lead to easier ones.
For ISEB we teach three techniques. Skip-and-Return (if a question takes more than 30 seconds, mark it and move on). The Inference Ladder for English (literal meaning → key word → connotation → writer’s intent). The Definition Method for vocabulary in context.
Worked example, in our voice. Library is to books as orchard is to which of the following: A) trees, B) fruit, C) apples, D) gardens, E) flowers. A library is the place where books are kept. An orchard is the place where fruit trees are grown. The structural match is A. Tempting wrong: B (fruit) — fruit is the product of an orchard, not what it contains by definition.
Stage 2: Assessment day at the Under School (January 2027)
Around 100 children are invited to a January day at 27 Vincent Square. Additional written papers in Maths and English, plus task-based activities and interactions with teachers. Westminster describes the day as informal and friendly, with teachers on hand to support and prompt. That framing is genuine — but it does not change the fact that the day is observed and the outcome decisive.
The written Maths paper covers Key Stage 2 with stretch into early Year 7 problem-solving. The written English paper includes comprehension with extended written-response questions and a short writing element. The task-based activities are designed to test how a child thinks and engages when working with others, not just whether they get the right answer.
For Stage 2 Maths: the Column Method, the LCM Method, the Hidden Question for word problems, and the discipline of showing every step of working.
For Stage 2 English: the Inference Ladder, the PEE Chain (Point, Evidence, Explanation) for written answers, and the STAR Method for short writing.
For the task-based activities, the Out Loud Method: speak through your thinking, not your conclusion. And what we call the Group Manners Rule: contribute, but listen first. Build on what others have said. Disagree politely if you disagree.
What Westminster is really looking for
The two-stage process tests cognitive ability, written work, and live engagement. Five qualities show up repeatedly across the children we have helped onto the Westminster offer list.
- Strong, consistent performance across Maths, English, and reasoning at ISEB. No weak section. The test is adaptive — a soft section drags the overall performance down quickly.
- Calmness in unfamiliar settings. The assessment day deliberately includes prompts and breaks. Children who can stay composed and engaged for several hours of varied activity stand out.
- Mathematical reasoning that draws on the full Key Stage 2 programme of study. Not just arithmetic — geometry, fractions, ratio, basic algebra in disguise.
- Reading depth and the ability to write a clear, structured response under timed conditions. Comprehension that goes beyond literal recall, into inference and writer’s intent.
- Genuine readiness to learn. Westminster does not reward rehearsed performance. Children who answer in their own words, who ask questions, who think aloud about something they have read — these are the ones markers notice.
The six most common pitfalls
- Over-tutoring. Westminster’s admissions material is explicit about this. Children who arrive at the assessment day visibly drilled — formulaic answers, rehearsed lines, no spontaneity — are noticed and not in the right way. Prepare for the format and the rigour, but protect the curiosity.
- Underweighting ISEB sections. ISEB is adaptive — a weak section drags the overall result down quickly. All four (English, Maths, VR, NVR) must be strong.
- Thinking the assessment day is informal. It feels informal because the school designs it to. But everything is observed. A child who treats it as a relaxed school visit will not stand out the way a child who engages thoughtfully will.
- Drilling only multiple choice. The January assessment day includes written Maths and English papers — write-your-own-answer format. A child who has only practised multiple choice will hit a wall.
- Missing the 30 September deadline. Westminster’s deadline is earlier than many peers. Diary it in spring.
- Forgetting the 13+ progression context. Westminster Under is two years (Years 7 and 8) before automatic progression to Westminster Senior at 13+, provided progress is maintained. Plan for the seven-year arc, not just the entry point.
The 12-month preparation pathway
A calm, well-paced 12 months for a Year 5 child targeting Westminster.
January to February (Year 5): Foundations. A diagnostic in English, Maths, VR, and NVR. Daily reading, 20–30 minutes. Begin a vocabulary book. Confirm Year 4 and Year 5 maths fluency.
March to May (Year 5): Building. Inference Ladder for comprehension. PEE Chain for written answers. STAR for short writing. Maths defaults: Column Method, LCM Method, Hidden Question. Daily VR and NVR practice begins (10 minutes a day for 12 months outperforms one hour a week).
June to August (summer): Curriculum coverage. Year 6 maths covered. Stretch problems introduced. Longer comprehension passages. ISEB-format online mocks every fortnight. Creative thinking and discussion practised at home.
September to October (Year 6): ISEB run-in. Full ISEB-format mocks. Registration submitted by 30 September.
Autumn 2026: ISEB sat. Quiet for a week after the test. Then pivot — Stage 2 written practice begins in earnest.
Late autumn to December: Stage 2 prep. Two Stage 2 written mocks per month. Side-by-Side Review every mock. Task-based activity practice introduced — group discussion at home, problem-solving with peers.
December: Christmas plan. Half-paced. One short session every other day. Real Christmas in there.
January: Assessment day. Light revision only in the final week. Walk the route to Vincent Square in advance. Two evenings before: early dinner, a film, early night.
The final eight weeks
From November (ISEB result) to early January (assessment day), your child is in the run-in to Stage 2.
Eight weeks out (mid-November). Three sessions a week. One full Stage 2 written mock per fortnight. Group activity practice once a fortnight.
Six weeks out (late November / early December). Two Stage 2 mocks across this fortnight. Group activity practice once a week.
Four weeks out (mid-December). Two mocks per week, shorter sessions in between. Side-by-Side Review every time. Practise the Anchor Face.
Two weeks out (late December). Christmas. Half-paced. One short session every other day.
Assessment day week (January). No mocks. Light vocabulary review only. Walk or check the route to Vincent Square in advance. Two evenings before: early dinner, a film, early night.
Mock exam strategy for Westminster
Two mock types are needed: ISEB-format and Stage 2 written / task-based.
When to start. Short-format mocks from late spring of Year 5. Full ISEB mocks from late September of Year 6. Stage 2 written mocks from late autumn (after ISEB is sat).
What a good Westminster mock looks like. ISEB: adaptive online format, four subjects (English, Maths, VR, NVR). Stage 2: written-format Maths and English papers, plus simulated task-based activities done in small groups.
How to read a mock report. Track the trajectory, not the absolute score. For ISEB, watch for the section that is dragging the overall result down. For Stage 2, the breakdown of where marks were lost and how a child engaged in group tasks is the value.
THE SIDE-BY-SIDE REVIEW METHOD After every mock, your child sits with a fresh page. On the left, the question got wrong. On the right, in their own handwriting, the correct working step by step.
Our Westminster mocks run several times across Year 5 and Year 6, calibrated to both ISEB and Stage 2 written/task-based formats.
Frequently asked questions
Girls have never sat the 11+ at Westminster before. Does that matter?
For the format, no — the ISEB and Stage 2 assessment work the same for boys and girls. For the cohort, yes — 2026 is the first year girls join, which means the applicant pool dynamics are new for everyone. Strong preparation is the answer regardless. Visit the new Chapter House facility if you can.
Westminster says "do not over-tutor". Should we tutor at all?
The school's concern is rehearsed, drilled, formulaic children who arrive without curiosity. The right preparation is the opposite of that — it teaches techniques, exposes the child to the format, and protects the spontaneity. A child who has been over-drilled stands out. A child who has been calmly prepared stands out for the right reasons.
How does Westminster compare to St Paul's, KCS, or CLS?
Westminster is central London and has just gone co-ed at 11+ from 2026. St Paul's is in Barnes with a small 11+ intake. KCS is in Wimbledon with three December papers. CLS is in the City with an online assessment. Each has its own format and atmosphere. Visit them.
What about the 13+ progression?
Children at Westminster Under move automatically to Westminster Senior at 13+ in Year 9, without further entrance tests, provided progress is maintained. The 11+ is therefore the single gateway for seven years of Westminster education.
Are bursaries genuinely available?
Yes. Westminster offers bursaries for eligible families. Apply alongside admissions.
How do I know if my child has a realistic chance?
We know after one diagnostic and one trial class. Within two hours we can usually tell you whether Westminster is realistic, ambitious, or beyond comfort.
No 11+ programme can guarantee an offer. Anyone who tells you otherwise is selling you something.
What preparation can deliver is this. By the time your child sits ISEB in autumn, they will know the adaptive format inside out. By the January assessment day, they will have practised written work and group activities multiple times. They will walk into Vincent Square calm and curious. They will be able to think aloud and ask questions, not just produce rehearsed answers. Whether the offer comes is in their hands. But they will sit it as the best version of themselves.
That is what twelve good months can do.
Your next steps with Academic Success
- See the website. Download the full PDF guide. Download at academicsuccess.uk →
- Join us on social media. @academicsuccess.uk.
- Sign up to the programme that fits your daughter.
- Weekly Workshops — small-group term-time classes on Zoom, building English, Maths, VR/NVR, and written work technique while protecting curiosity. Browse →
- Holiday Intensives — October half-term (for ISEB) and Christmas-period (for Stage 2). Browse →
- Summer School at NLCS, Edgware — flagship in-person summer school. Browse →
- Westminster-format Mock Exams — both ISEB and Stage 2 written/task-based, with Side-by-Side Review. Browse →
About Reena and Academic Success
Reena Damani is the founder and head teacher of Academic Success UK. A Habs Girls’ alumna with over 20 years working with children preparing for selective school entry, she has guided hundreds onto the offer lists of London’s most competitive schools, including Westminster, St Paul’s, CLS, KCS, the Habs schools, NLCS, and the Tiffin schools.
Academic Success UK is a specialist tutoring and school preparation company based in north London. Small-group teacher-led classes, term-time programmes, holiday intensives, and full mock exams for 4+, 7+, and 11+.
Confidence first, results follow.
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