Katherine Warington School is a mixed secondary free school in Harpenden, Hertfordshire County Council, teaching 1,113 pupils aged 11 to 19. Ofsted rated it Good at its last graded inspection in February 2024. In 2024–2025, GCSE Attainment 8 was 54.8 (England 46.1). Term dates and holidays for 2025–2026 are listed below.

Ofsted inspection

The latest published Ofsted judgement for Katherine Warington School.

Latest inspection
Good Overall effectiveness
Quality of educationGood
Behaviour & attitudesGood
Personal developmentOutstanding
Leadership & managementGood
S5 Inspection · Inspected 28 Feb 2024 · Published 24 Apr 2024
Read full Ofsted report ↗

Scale: Outstanding Good Requires improvement Inadequate

Term dates & holidays 2025–2026

Autumn, spring and summer terms, half-terms, INSET days and bank holidays for Katherine Warington School.

Katherine Warington School term dates calendar 2025–2026
Official term-dates calendar · 2025–2026 · source

Key dates (2025–2026)

  • Inset Day Wed 03 Sept 2025 Inset Day
  • Year 7 & 12 Start Thurs 04 Sept 2025 Event
  • Years 8-11 & 13 Start Fri 05 Sept 2025 Event
  • Early Finish (12:05pm for Open Morning) Fri 12 Sept 2025 Event
  • Open Day (09:00 – 13:00) Sat 13 Sept 2025 Event
  • Inset Day Mon 15 Sept 2025 Inset Day
  • Autumn Half Term Mon 27 Oct – Fri 31 Oct 2025 Holiday
  • Occasional Day Fri 28 Nov 2025 Event
  • Break for Christmas (12:05pm) Fri 19 Dec 2025 Holiday
  • Christmas Holiday Mon 22 Dec 2025 – Fri 02 Jan 2026 Holiday
  • Inset Day Mon 05 Jan 2026 Inset Day
  • Spring Half Term Mon 16 – Fri 20 Feb 2026 Holiday
  • Break for Easter (12:05pm) Fri 27 Mar 2026 Holiday
  • Easter Holiday Mon 30 Mar – Fri 10 Apr 2026 Holiday
  • Summer Half Term Mon 25 – Fri 29 May 2026 Holiday
  • Inset Day Mon 29 Jun 2026 Inset Day
  • Break for Summer (12:05pm) Fri 17 Jul 2026 Holiday
  • Inset Days (Disaggregated) Mon 20 Jul – Thurs 23 Jul 2026 Inset Day
  • Summer Holiday Fri 24 Jul – Mon 31 Aug 2026 Holiday
  • Expected Summer School Dates Mon 17 – Wed 19 Aug 2026 Event
  • Expected GCSE Results Day Thurs 20 Aug 2026 Event
  • Christmas Day (Bank Holiday) Thu 25 Dec 2025 Holiday
  • Boxing Day (Bank Holiday) Fri 26 Dec 2025 Holiday
  • New Year's Day (Bank Holiday) Thu 01 Jan 2026 Holiday
  • Good Friday (Bank Holiday) Fri 03 Apr 2026 Holiday
  • Easter Monday (Bank Holiday) Mon 06 Apr 2026 Holiday
  • Early May Bank Holiday Mon 04 May 2026 Holiday
  • Spring Bank Holiday Mon 25 May 2026 Holiday
  • Summer Bank Holiday Mon 31 Aug 2026 Holiday

Exam results & performance

DfE performance tables Official results, 2024–2025 GOV.UK ↗
54.8 Attainment 8 England 46.1 Top 14%
59.5% Grade 5+ English & maths England 45.4% Top 16%
16.5% Persistent absence England 17.8%

The measures that carry the most signal. Open a section to compare Katherine Warington School with Hertfordshire County Council and England.

Key stage 4 (GCSE) 54.8 Attainment 8 score

Year 11 results across eight qualifications, including English and maths.

This school Hertfordshire County Council England

Attainment 8 score · Average across 8 GCSEs, out of 90 54.8
Hertfordshire County Council 50.6 England 46.1 +8.7 vs England
Grade 5+ in English & maths · A strong pass 59.5%
Hertfordshire County Council 53.4% England 45.4% +14.1 vs England
Attainment 8 — disadvantaged pupils 36.1
Hertfordshire County Council 34.2 England 34.9 +1.2 vs England
Disadvantage gap · Attainment 8 points; smaller is better 23.4
Hertfordshire County Council 19.9 England 15.5 +7.9 vs England
Disadvantaged pupils in the year group · Context for the scores above 20.2%
Hertfordshire County Council 17.7% England 28.2%
Pupils in the year group · Small cohorts swing wildly 173
Attendance 16.5% Persistently absent pupils

Absence across the whole school year.

This school Hertfordshire County Council England

Persistently absent pupils · Missed 10%+ of sessions; lower is better 16.5%
Hertfordshire County Council 16.5% England 17.8% -1.3 vs England
Overall absence · Lower is better 7.5%
Hertfordshire County Council 6.5% England 6.8% +0.7 vs England
About this data source & caveats

Progress 8 is not published for 2024–2025. This year group missed their key stage 2 tests in 2020, so there is no baseline to measure progress from.

Attendance comparisons are pupil-weighted averages we calculate from every school’s published absence figure — the DfE absence file has no local authority or England rows of its own.

We show the headline measures only. Threshold and curriculum-policy figures — grade 4+ in English and maths, EBacc entry and points, the per-subject key stage 2 breakdown, academic and applied splits at 16 to 18 — reflect admissions and curriculum choices more than school quality, so they are left to GOV.UK. Progress measures matter most because they compare pupils with others who started at the same level; attainment on its own largely tracks a school’s intake.

Figures are the Department for Education’s official published results for Katherine Warington School. Results are suppressed where too few pupils were entered. England figures are the average for state-funded schools. “Top x%” is this school’s position among all schools in England with a published figure for that measure — the DfE does not publish league table rankings.

Source: Compare school and college performance, Department for Education. Contains public sector information licensed under the Open Government Licence v3.0.

Location & catchment area

Indicative catchment Other secondary schools

Indicative only. This is a nearest-school (Voronoi) estimate — the area closer to Katherine Warington School than to any other secondary school. Real admissions depend on the school’s own policy (straight-line distance, siblings, faith, feeder schools and available places) and change each year. Always confirm with the school and local authority admissions team.