57 (Newfoundland) Heavy Regiment RA was formed at Colney Castle, Colney in April 1940 from a cadre from 71 Field Regiment RA(TA). The Regiment was converted in November 1941 to 166 (Newfoundland) Field Regiment RA.
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.
| 8 Apr 40 | Formed | Colney, Sussex, UK | |
| Jul 40 | Adopted Newfoundland title | UK | |
| Aug 40 |  |
Eastern Command | UK |
| 15 Nov 41 | Became 166 Field Regiment |
Batteries
| Apr 40 | A, B, C, D |