140 Heavy Anti-Aircraft Regiment RA(TA) was formed at Bristol in December 1941. The Regiment was disbanded in April 1946 at Weymouth, Dorset to resuscitate 6 Heavy Anti-Aircraft Regiment RA.
| Dec 41 | Formed | Bristol, UK |
| Dec 41 | 46 Anti-Aircraft Brigade, 8 Anti-Aircraft Division | South West England |
| May 42 | 69 Anti-Aircraft Brigade, 8 Anti-Aircraft Division | South West England |
| Oct 42 | 65 Anti-Aircraft Brigade, 5 Anti-Aircraft Group | UK |
| Jan 44 | 40 Anti-Aircraft Brigade, 2 Anti-Aircraft Group | Southern England |
| Jul 44 | ?? | |
| Feb 45 | 102 Anti-Aircraft Brigade, 9 Anti-Aircraft Group | Southern England |
Batteries
| Jan 44 | 418, 420, 429, 430 |
| Feb 45 | 418, 420, 429 |
