In November 1938, 107 Field Brigade RA (TA) was re-designated 107 RHA. In July 1942, 107 RHA suffered severe casualties at The Cauldron and was reformed. It became 107 Medium Battery in 7 Medium Regiment. In March 1944 the Battery was expanded to form 107 (South Nottinghamshire Hussars Yeomanry) Medium Regiment RA (TA). it went into suspended animation in March 1946. 107 (South Nottinghamshire Hussars Yeomanry) Medium Regiment RA (TA) was reconstituted as 307 (South Nottinghamshire Hussars) Field Regiment RA (TA) in January 1947.
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| Mar 44 | Expanded from 107 Medium Battery (converted from remains of 107 RHA) |
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| Mar 44 |  |
2 Army | UK |
| Jun 44 |  |
21 Army Group, 9 Army Group RA | NW Europe |
Batteries
| Mar 44 | 425, 426 |