Families researching girls’ boarding schools in the UK often start with three questions: is the school selective, how does boarding work, and what support exists for international students. Thornton College（桑顿学院）, a Catholic independent day and boarding school for girls aged 3–19 near Milton Keynes in Buckinghamshire, answers all three in a distinctive way: it describes itself as a “highly successful non-selective school”, and it runs a dedicated international programme including a short-stay immersion option from two weeks to a year. This guide compiles what the school’s own website publishes about its programs, entry requirements, fees and application support, as of 4 August 2026. Fees, dates and requirements change annually, so the latest official pages are the final word.
School profile and campus
Thornton College sits in the village of Thornton near Milton Keynes, Buckinghamshire (MK17 0HJ), on 25 acres of parkland, with the school highlighting its proximity to London, Oxford and Cambridge. Its history runs deep: the manor is recorded in the Domesday Book of 1086, and in 1917 the Sisters of Jesus and Mary purchased the estate and founded Thornton College as a girls’ school rooted in the mission of St Claudine Thévenet. Recent development milestones include the Thevenet Wing for Pre-Prep (2002), the St Clare Building with science laboratories (2010), a Sixth Form refurbishment (2016), a Forest School programme with an Eco Park (2019), and the conversion of The Villa into a Year 13 boarding house (2024). According to the school’s own FAQ, there are approximately 320 girls in the school, of whom around 60 are boarders; each year roughly 20–25 international students join as termly boarders for one year or longer, studying towards GCSEs or A-Levels. Around 20% of students come from Catholic families; the school welcomes families of all faiths and none. Thornton received a British Council School Award at Foundation level in April 2024 and at Intermediate level in January 2025.
Programs and academic structure
Thornton College is organised into Pre-Prep (Pre-Reception to Year 2), Prep (Years 3–6), Senior (Years 7–11, GCSE years) and Sixth Form (Years 12–13). The Sixth Form offers a wide range of A-Level courses plus vocational qualifications, with recently added subjects including Economics, Forensics, and Health & Social Care; option blocks are built around students’ actual subject choices. Class sizes generally sit at a maximum of 20 students, and the school is accredited by NACE, the National Association for Able Children in Education. For students whose first language is not English, the school runs an Additional English (EAL) curriculum that prepares students for Cambridge English examinations (KET, PET, FCE and CAE levels); students entering Years 9 and 10 need a reasonable level of conversational English and are supported towards full fluency. Every student also completes the Key Skills Award, building a portfolio of evidence across skills such as working with others, independent research and problem solving.
Entry requirements
Thornton College admits girls throughout the year, with the main intake years being Pre-Reception, Reception, Year 7, Year 9 and Year 12; some year groups have had waiting lists, so the school advises enquiring early. There is no entrance exam: the school describes itself as non-selective, offering a place when it judges that a student can access the curriculum independently and that the school can fulfil her potential. The published procedure has four steps: register (via the online enquiry form, email or phone, with a personal tour arranged), taster visit (the girl joins her current year group for one or two days), interview with the Headteacher Dr Louise Shaw, and offer — after which the school requests a reference from the current school and the family signs a parent contract. Different procedures apply for UK, EU and international students because of Child Student Visa requirements (formerly Tier 4). For Sixth Form entry, the school recommends grade 6 or above at GCSE for A-Level subjects (with pathways explored for lower starting points), an options discussion with the Head of Sixth Form Mrs Ruth Coates, and an interview with the Headteacher; all offers are conditional on satisfactory GCSE performance.
Costs and fees (September 2026 – August 2027)
The Thornton College fees page publishes termly fees for 2026/27 combining tuition and boarding fee (inc. VAT) with lunch (not subject to VAT): Reception and Year 1 £5,015 plus £310 lunch; Year 2 £5,490 plus £330; Year 3 day £5,490, weekly boarder £9,160, termly boarder £11,915 (lunch £330); Years 4–6 day £6,335, day boarder £8,820, weekly boarder £10,025, termly boarder £12,810 (lunch £330); Years 7–13 day £8,140, day boarder £10,685, weekly boarder £12,770, termly boarder £15,940 (lunch £355). Boarding fees include term-time accommodation, meals in boarding, tuition, textbooks and laundry, with weekend activities charged separately; day fees include compulsory school lunch, and extras such as bus transport, wraparound care and exam fees are excluded. Fees are due in full by the first day of each term; overseas parents can pay via FlyWire, and a monthly instalment route is available through third-party fee plan providers. Sibling discounts are 5% for a second daughter and 10% for a third, and a Fees In Advance scheme (minimum three consecutive terms) earns an annual 2.5% discount. For the Short-Stay Immersion Programme in 2026/27, the deposit is £750 for EU students and £1,500 for overseas students, with a registration fee of £110 plus 20% VAT (£132).
Boarding and international support
Four boarding options are available at Thornton College: termly boarding (in school through the week and at weekends, with half-term breaks), weekly boarding (about half of boarders return home each weekend, living in school from Sunday night to Friday), flexi-boarding (choose nights as needed, combinable with the daily bus service) and occasional boarding for existing students. Boarding is based in two main houses, Barton and Chastillon: Years 8–9 sleep in rooms of six to eight in the Tyrellcote Wing, Year 10 in twin bedrooms on the Harris or Warrington wings, Years 11–12 in single study bedrooms in the Whittlebury Wing, and Year 13 students live in The Villa, a detached house on the grounds where each girl has her own bedroom, a communal kitchen and a washing machine. Boarding begins from Year 3 (age 7). The Short-Stay Immersion Programme welcomes international students from as little as two weeks up to a year, as a day pupil, weekly boarder or full boarder, with a buddy assigned in class, lessons taught in English, and ESOL available for boarders; the school lists Spain, Saudi Arabia, Singapore, China, Canada, France, Nigeria and Germany among the countries girls come from. Students whose parents live overseas must appoint an educational guardian, per the school’s guardianship policy.
Term dates 2026/27 and planning ahead
The published 2026/27 calendar runs: Michaelmas term opens Thursday 3 September 2026, half-term Friday 16 October to Sunday 1 November, term closes Friday 11 December; Lent term opens Tuesday 5 January 2027, half-term Friday 12 February to Sunday 21 February, term closes Thursday 25 March; Trinity term opens Tuesday 13 April 2027, half-term Friday 28 May to Sunday 6 June, term closes Friday 9 July. The school accepts registrations at any time and recommends registering as early as possible; if a year group is approaching capacity, registered families are notified so they can secure a place before any waiting list. This guide reflects the Thornton College website as of 4 August 2026. If you would like to map your daughter’s age, English level and target year group onto the right program and application timeline, our consultants can help you work through your specific situation.