73 (Kent Fortress) Searchlight Regiment RA (TA) formed in August 1940 by the transfer of 73 (Kent Fortress) Anti-Aircraft Battalion Royal Engineers (TA) to the RA. The Regiment served in Anti-Aircraft Command for the entire war. It served in the South East of England before being placed in suspended animation in September 1944. 73 (Kent Fortress) Searchlight Regiment RA (TA) was re-constituted as 608 (Mixed) Heavy Anti-Aircraft 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.
| Apr 39 | 73 Anti-Aircraft Battalion Royal Engineers | Bexley, London,UK | |
| Aug 40 |  |
6 Anti-Aircraft Division, 56 Light Anti-Aircraft Brigade | Kent, UK |
| Aug 40 | Became RA | ||
| Oct 42 | |
2 Anti-Aircraft Group, 56 Light Anti-Aircraft Brigade | Kent, UK |
| Feb 43 | |
2 Anti-Aircraft Group, 27 Anti-Aircraft Brigade | South Coast England |
| Apr 43 | |
2 Anti-Aircraft Group, 56 Light Anti-Aircraft Brigade | Kent, UK |
| Sep 44 | Suspended animation |
Batteries
| Sep 39 | 322, 331, 347 |
| Jan 42 | 322, 331, 347, 508 |
| Jul 43 | 322, 331, 508 |