124 (Northumbrian) Field Regiment RA (TA) was formed as a duplicate of 72 Field Regiment in May 1939 with two batteries . In May 1943 a third battery joined. Post war 124 (Northumbrian) Field Regiment RA (TA) went into suspended animation in January 1946 and was re-constituted as 324 (Northumbrian) 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.
(Title authorised February 1942)
| May 39 | 23 Infantry Division | Cowgate, Cumbria, UK | |
| Jun 40 |  |
50 Infantry Division | Bournemouth, Dorset, UK |
| Jun 41 | |
50 Infantry Division | N Africa |
| Jul 41 | |
50 Infantry Division | Cyprus |
| Nov 41 | |
50 Infantry Division | Baghdad, Iraq |
| Jan 42 | |
50 Infantry Division | Syria |
| Feb 42 | |
50 Infantry Division | N Africa |
| Oct 42 | |
50 Infantry Division | Alamein, Egypt |
| Feb 43 | |
50 Infantry Division | Regima, Libya |
| Mar 43 | |
50 Infantry Division | Bou Grara, Tunisia |
| Jul 43 | |
50 Infantry Division | Sicily |
| Nov 43 | |
50 Infantry Division | UK |
| Jun 44 | |
50 Infantry Division | NW Europe |
| Jan 45 | Home Forces | UK | |
| Jun 45 |  |
55 Infantry Division | UK |
Batteries
| May 39 | 287 (3rd Northumbrian), 288 (4th Northumbrian) |
| Apr 42 | 287, 288, 257 Anti-Tank Battery |
| Jul 42 | 288, 489 |
| May 43 | 287, 288, 441 |
Equipment
| Nov 39 | 288 Batttery – French 75 mm Guns, 287 Battery Fixed Coastal Defences |
| Dec 40 | 24 x 25 pdr Guns |
| Jun 44 | M7 105mm Self Propelled Priest |