157 (Mixed) Heavy Anti-Aircraft Regiment RA(TA) was formed at Fort Fareham in May 1942. It became a non-mixed Regiment in February 1945. The Regiment was disbanded in October 1945 at Woodbridge, Suffolk.
| May 42 | Formed | Fareham, Hampshire, UK |
| May 42 | 35 Anti-Aircraft Brigade, 5 Anti-Aircraft Division | Portsmouth, Hampshire, UK |
| Oct 43 | 33 Anti-Aircraft Brigade, 4 Anti-Aircraft Group | North West England |
| Feb 45 | 37 Anti-Aircraft Brigade, 9 Anti-Aircraft Group | East Anglia, UK |
| Feb 45 | Re-organised as a non-mixed regiment | |
| Oct 45 | Disbanded |
Batteries
| Jun 42 | 539 (Mixed), 550 (Mixed), 551 (Mixed) |
| Aug 42 | 539 (M), 550 (M), 551 (M), 564 (M) |
| Oct 42 | 539 (M), 550 (M), 551 (M) |
| Feb 43 | 505 (M), 539 (M), 550 (M), 551 (M) |
| Feb 45 | 415, 430, 438, 550, 551 |
| Apr 45 | 415, 430, 438, 551 |
| May 45 | 415, 430, 438 |
| Aug 45 | 415, 430 |
