| September 1942 | CO: Lt Col D Dawnay |
| Sep 42 | North Irish Horse |
| 1/9/42 | Thetford T/Capt P Welch promoted A/paid Major wef 6th Aug 42. Lt PCM Sinclair promoted A/P/Capt wef 6 Aug 42. |
| 4/9/42 | 2Lts J Maxwell, RE Perioli & HE Irwin posted from RAC OCTU. 2Lt GE Gardiner posted in from RA OCTU. |
| 6/9/42 | The Regt transferred from 34th Army Tk Bde to 25th Army Tk Bde. 2Lt AE Hazel reported for duty from RAC OCTU. |
| 8/9/42 | Regt took part in Ex CONQUISADOR on the 8th and 9th. T/Major the Lord O'Neill appointed 2i/c wef 3rd Jan 1942. |
| 12/9/42 | Regt on Ex BLAZER. |
| 15/8/42 | 2Lt JF Armitage promoted W/S Lt. Drafts for first line reinforcements joined the Regt from 108th, 109th & 143rd Regts RAC. |
| 19/9/42 | 2Lt JW Denny posted from RAC OCTU. |
| 20/9/42 | Regt participated in Ex BASIS. |
| 23/9/42 | Regt took part in Ex YUGO on 23rd & 24th. |
| 24/9/42 | Regt changed to War Establishment 11/33A/5 (since renumbered 11/154/1) |
| 26/9/42 | Regt took part in Div scheme YOHO. 2Lt F Medley posted to 25th Army Tk Bde. First drivers and gunners proceeded to AFV RANGES MINEHEAD. |