100th (Yeomanry) Regiment Royal Artillery

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100 (Yeomanry) Regiment Royal Artillery
Active 1967-2014
Allegiance  United Kingdom
Branch  British Army
Role Field support
Size 3 Batteries
Garrison/HQ Army Reserve Centre, Luton
Equipment L118 Light Gun

100 (Yeomanry) Regiment Royal Artillery was part of the Army Reserve and had sub-units throughout the South of England. It had three gun batteries all equipped with the L118 Light Gun. The Regiment's original role was British Army of the Rhine (BAOR) emergency reinforcement, emphasised by its transfer into 49 Infantry Brigade under part of 2 Division. Under 'Options for Change', the Regiment became a general support unit fitted out with the 155 towed FH70 gun and assigned to 3 Division; in 1999 it was reassigned as a CS (Close Support) Regiment, losing its ability to deploy as a whole unit. Under Army 2020 it was placed in suspended animation.


The regiment was formed as 100th (Eastern) Medium Regiment Royal Artillery at Grove Park in London in 1967.[1] Its sub-units were RHQ, HQ (Home Counties) Battery at Grove Park, 200 (Sussex Yeomanry) Medium Battery at Brighton, 201 (Herfordshire and Bedfordshire Yeomanry) Medium Battery at Luton, 202 (Suffolk and Norfolk Yeomanry) Medium Battery at Bury St Edmunds and REME LAD which expanded into a workshop during the FH70 period.[1] In 1970 it became 100th Regiment Royal Artillery and in 1976 it became 100 (Yeomanry) Field Regiment Royal Artillery.[1] In 1993 200 Battery left the regiment and 307 (South Nottinghamshire Hussars) Battery at Bulwell joined the unit.[1] It was renamed 100 (Yeomanry) Regiment Royal Artillery in 1993 and in 1999, HQ and 202 Batteries left the regiment; 202 was replaced by 266 (Gloucestershire Volunteer Artillery) Battery at Bristol.[1]

Under Army 2020, this unit was placed in suspended animation and one of its batteries was transferred to another regiment.[2]


The batteries were as follows:[3]

Honorary colonels[edit]


  1. ^ a b c d e "Royal Regiment of Artillery, Volunteer Regiments". Archived from the original on 15 March 2004. Retrieved 11 May 2014. 
  2. ^ a b c d Summary of Reserve Structure and Basing Changes Archived 2013-08-10 at the Wayback Machine.
  3. ^ "100 Regiment RA". Ministry of Defence. Archived from the original on 23 October 2013. Retrieved 11 May 2014. 
  4. ^ a b "No. 56164". The London Gazette (Supplement). 2 April 2001. p. 4052.