145 (Berkshire Yeomanry) Field Regiment RA (TA) was formed as a duplicate of 99 Field Regiment in June 1939 with two batteries . In January 1941 a third battery was formed at Antrim. They moved to India in February 1945, finishing their war there. The Regiment went into suspended animation in June 1946 in South East Asia less 395 Battery who went to 178 Field Regiment. 145 (Berkshire Yeomanry) Field Regiment RA (TA) was re-constituted as 345 (Berkshire Yeomanry) Medium 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.
(Title authorised February 1942 as Buckinghamshire & Berkshire Yeomanry – amended in May 1942 to Berkshire Yeomanry)
| Jun 39 |  |
61 Infantry Division | Newbury, Berkshire, UK |
| Jan 44 | Home Forces | UK | |
| Aug 44 | |
61 Infantry Division | UK |
| Feb 45 | Dehra Dun Area | India | |
| Mar 45 |  |
39 Indian Division | Dehra Dun, India |
| Jun 45 |  |
36 Infantry Division | Poona, India |
| Jul 45 |  |
26 Indian Division | Bangalore, India |
| Aug 45 |  |
25 Indian Division | Cocanada, India |
Batteries
| Jun 39 | 395 (Berkshire Yeomanry), 396 (Berkshire Yeomanry) |
| Jan 41 | 395, 396, 509 |