105 Anti-Tank Regiment RA was formed at Almaza in Egypt in Decmber 1942 with three batteries. A fourth was added in March 1943. The Regiment served in Palestine, Sicily and Italy. 105 Anti-Tank Regiment RA was disbanded in April 1945.
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.
| Dec 42 | Formed | Almaza, Egypt | |
| Mar 43 |  |
6 Army Group RA | Beni Yusef, Egypt |
| May 43 |  |
13 Corps | Beni Yusef, Egypt |
| Jun 43 | |
13 Corps | Tripoli, Libya |
| Jul 43 |  |
8 Army | Floridia, Sicily |
| Aug 43 | |
8 Army | Paterno, Italy |
| Aug 43 | |
8 Army | Scordia, Italy |
| Sep 43 | |
8 Army | Nicastro, Italy |
| Oct 43 | |
8 Army | San Severo, Italy |
| Nov 43 | |
8 Army | Celenza, Italy |
| Dec 43 | |
8 Army | Monte San Angelo, Italy |
| May 44 | |
13 Corps | Cassino, Italy |
| Apr 45 | Disbanded |
Batteries
| Dec 42 | Q, 209 – Q known as B from Jan 43 |
| Mar 43 | 209, 314 (ex A/95 ATk), 315 (ex B Bty), 316 (new Bty) |
Equipment
| 1942-43 | 2 batteries 6pdr Self Propelled Deacon, 2 batteries 6 pdr Ford B type portee |
| Apr 43 | 24 x Pheasant 17 pdr Guns, 22 x Morris FA Tractors, 1 x Guy FA Tractor |
| Jan 45 | 4 x 6 pdr Guns, 8 x 17 pdr Guns, 18 x M10 3 inch Self Propelled Guns, 12 x Valentine 17 pdr Self Propelled Guns (Archer) 9 x Stuart Tanks, 8 x Armoured Half Track Scout Cars, 3 x White Armoured Scout Cars |