168 Field Regiment RA was formed in December 1941 at Southend with three batteries. The Regiment was converted into 168 Medium Regiment RA in December 1943. 141 & 142 Batteries converted to Medium Batteries and 143 Battery disbanded.
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.
| Dec 41 | Formed | Southend, Essex, UK | |
| Dec 41 | Home Forces | UK | |
| Jun 42 |  |
54 Infantry Division | UK |
| Jun 43 |  |
47 Infantry Division | UK |
| Dec 43 | Became 168 Medium Regiment |
Batteries
| Dec 41 | A, B, C |
| Mar 42 | P, Q, R |
| Jan 43 | 141, 143, 570 |
| Jan 43 | 141, 142, 143 |