This is an annual publication containing information on the strength of UK Reserve Forces, including Regular and Volunteer Reserves, and MOD Sponsored Cadet Forces, broken down by Service. It uses data from the Ministry of Defence Joint Personnel Administration System (JPA) and single Service systems.
Sources and Data Quality Notes
Data on Naval Service Regular Reservists at 1 April 2009, 2010 and 2011, Army Regular Reservists, and Royal Air Force Individuals Liable to Recall at 1 April 2009, 2010 and 2011 are not included in this publication. Tri-Service Regular Reserve data were not migrated across from legacy systems onto the Joint Personnel Administration (JPA) system, and any data subsequent to its introduction have been sourced from the single Services where available. The absence of Naval Service Regular Reserve data in 2006 was caused by the disestablishment of the secretariat responsible for the compilation of Naval Service Reserve data. In 2008, data were compiled by a reorganised secretariat, however concerns over the quality of the source data prohibited publication of the 2009, 2010 and 2011 Naval Service Regular Reserve data.
Due to discontinuity in time series data, no graphs for Regular Reserve data are presented.
Volunteer Reserve data appear on the JPA system, however there are known issues with the quality of the data. Naval Service Volunteer Reserve data at 1 April 2008 onwards were therefore sourced directly from the Naval Service. Army and Royal Air Force Volunteer Reserve data for 2008 onwards were sourced from JPA, however validation is ongoing and as such the figures presented here are provisional.
DASA have initiated a major review of all historic JPA data and aim to revise provisional data (if necessary) during the course of 2011. No further data will be finalised until then. Revisions to strength figures are likely to be small. In addition, the Ministry of Defence is undertaking to improve the quality of Army Reserves data, with a view to correcting the recording of Contract Types and Assignment Types as referred to in Table 3, footnote 2.
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