Current released edition
Version 1.0.0, last editorial review 2026-10-16. It includes 9 personnel strength dates, 4 rolling intake/outflow periods, and 3 specific official MoD statistical reports. This is an approved static snapshot, not an automatically updating recruitment or application feed.
Data sources and publication vintages
MoD Quarterly Service Personnel Statistics: 1 July 2026 (revised)
Source ID: mod-2026-july
Published / source vintage: 2026-09-03 · source revision 2026-09-23
Displayed precision: nearest 10 in the narrative summary.
Extracted: Table 1: UK Forces Strength; Table 2: Full-time trained / trade-trained strength; Section 6: 12-month Regular intake/outflow. This September 2026 revision corrects published figures and commentary; the dates in its historical table may supersede older reports.
MoD Quarterly Service Personnel Statistics: 1 October 2025
Source ID: mod-2025-october
Published / source vintage: 2025-11-27 · source revision 2025-11-27
Displayed precision: nearest 10 in the narrative summary.
Extracted: Table 1: UK Forces Strength; Table 2: Full-time trained / trade-trained strength; Key Points: 12-month Regular intake/outflow. Provides October 2024 and April/October 2025 observations omitted from the July 2026 summary table. Cross-publication historical comparisons are approximate.
MoD Quarterly Service Personnel Statistics: 1 January 2025
Source ID: mod-2025-january
Published / source vintage: 2025-02-20
Displayed precision: nearest 10 in the narrative summary.
Extracted: Key Points: 12-month Regular intake/outflow. Used only for the 12 months ended 31 December 2024 intake/outflow figures, not the mixed-precision January 2025 strength table.
Definitions that must not be combined
All Armed Forces personnel
The reported combined strength across UK Regular Forces, Gurkhas, Volunteer Reserves and Other Personnel. Not the size of the Regular Forces. The dataset column key is total.
UK Regular Forces personnel
Full-time UK Regular personnel as defined in the report, excluding Gurkhas, Volunteer Reserves and specified other personnel categories. The dataset column key is regular.
Volunteer Reserve personnel
Volunteer Reserve strength, not a count of trained Reserve personnel and not necessarily the same as Future Reserves 2020 measures. The dataset column key is reserve.
Combined full-time trained / trade-trained strength
Royal Navy/Marines and RAF full-time trained strength PLUS Army full-time trade-trained strength; includes eligible Gurkhas and relevant FTRS elements. Not directly comparable to a Regular Force subtotal. The dataset column key is trained.
UK Regular Forces intake and outflow
These numbers refer to people joining or leaving the defined UK Regular Forces population within the preceding 12 months. The period end date differs from the date used for a point-in-time serving strength snapshot. Our displayed subtraction uses published rounded headline numbers; it is an illustrative arithmetic difference, not necessarily the MoD's unrounded net-flow result.
Why the statistics can disagree by ten
The referenced headline reports round some personnel figures to the nearest ten. Adding rounded individual service figures can differ from the separately rounded tri-service total, even when the underlying official data are consistent. We therefore store the total the MoD actually published instead of manufacturing one by addition.
The 1 July 2026 report was updated on 23 September 2026. Older reports can have different definitions, revisions or rounding conventions. Each strength observation stores a source identifier, so the same reporting date can be reconciled when future versions of the dataset are compiled.
Why we avoid recruitment acceptance rates
Application records are not unique individuals, and the Ministry of Defence explicitly cautions against aggregating service-level application figures into a tri-service total because definitions vary. Applications and the intake recorded over the same 12-month window are also not aligned applicant cohorts. For these reasons the library will not divide one by the other, infer odds of success or label official staffing strength as an "acceptance" measurement.
The Royal Navy / Royal Marines are often one combined reporting category. The historical narrative of a recruitment change is not evidence that it caused a strength trend. We provide a separate change tracker with source dates and limitations.
The separate 2017–2026 July research edition
Our new ten-year strength research page is a separate 1.0.0 edition covering one published July observation each year from 2017 to 2026, not an extension that invents missing quarters in the nine-point initial archive. The 2017–2018 rows cite the 2020 MoD Table 1 vintage; 2019–2022 cite the 2022 vintage; 2023–2026 cite the revised September 2026 Table 1. See the complete source-level JSON or long-format CSV.
That decade view intentionally compares only total personnel, UK Regular Forces and Volunteer Reserves in distinct populations. It does not splice older trained/trade-trained definitions after the 2016 Army definition change. Every observation retains its original report source, vintage and nearest-ten rounding. Research should never report a July-to-July personnel change as the number of recruits or selection passes. It is a separate historic edition, not a new live feed.
Historic calendar-year averages, 2000–2023
The 24-year UK Regular Forces archive re-presents exactly 72 reported British Army, Naval Service and RAF service-year figures from the Ministry of Defence answer to Parliamentary Question 10473 on 25 January 2024. These are unweighted means of four quarterly strengths per calendar year, NOT July personnel stocks. January 2000 was estimated by interpolation. The official answer rounds 2000–2007 to the nearest hundred and 2008–2023 to the nearest ten. It does not publish matching 2024–2026 annual averages, so none were manufactured.
The source-linked annual mean JSON and long-format CSV preserve year, branch, estimation caveat and precision. Adding separately rounded service means produces derived figures rather than an independently published official tri-service total.
June-ended 2020–2026 recruitment and voluntary-outflow edition
Our seven-year comparison records MOD headline UK Regular Forces intake and outflow in each rolling 12-month window ending 30 June. It separately records trained/trade-trained voluntary outflow and its service-specific rates, whose denominator is the relevant average trained/trade-trained strength—not the all-Regular entrants, applicants or all exits. We explicitly retain disagreements between printed rounded arithmetic and MOD narrative net-flow text in 2022, 2023 and 2026.
Full structured sources and caveats ↗ · Source-linked CSV ↗. Do not splice these movement windows into the separately dated annual-mean and July-strength datasets.
Quality checks performed before a release
Each historical entry is reviewed against the official published table, assigned a known source identifier, tested for chronological ordering and valid reporting definitions, and checked that rounded service figures approximately match the reported overall totals. Test failures block the GitHub build. Automated discovery does not automatically change a verified public statistic.
Where the source changes or a previous extraction is found to be wrong, a reviewer should update the relevant observation and record the data vintage, affected period and reason in the release notes. The repository history preserves earlier versions and permits a rollback.
Data reuse and licence
Ministry of Defence statistical information is credited to the Ministry of Defence, Crown copyright, reproduced and adapted under the Open Government Licence v3.0 ↗, unless otherwise stated by an individual source. The interactive presentation and derived arithmetic are independent Project Selection work; the source data remain official public-sector information.
Suggest a correction
Use the site's contact route, preferably citing the exact official URL, table, reporting date and definition that needs attention. Do not submit private candidate, medical or recruitment identification details.