| December 1941 | CO: Lt Col D Dawnay |
| Dec 41 | North Irish Horse |
| 1/12/41 | Westbury Regt came under command of 34 Army Tank Bde – Brig JN Tetley TD. |
| 6/12/41 | 2Lt MP Williams posted in from 102 OCTU. 2Lt RBM King and 2LT AT Moore posted in from 103 OCTU. |
| 8/12/41 | T/Capt AEW Gaston attached to HQ 34 Army Tank Bde as Staff Captain. 2Lt JAG Biggs assumed appointment of 2i/c A Sqn. |
| 12/12/41 | Regt inspected by the Earl of Shaftesbury. |
| 15/12/41 | 2Lt CM Thomas transferred from A to HQ Sqn and assumed appointment of Signals Officer. |
| 18/12/41 | 2Lt T Zissu posted in from 61st Trng Regt and assumed appointment of Assistant Technical Adjt. |
| 20/12/41 | 2Lt HV Williams and 2Lt EW Clifford posted in from 101 OCTU. 2Lt JJH Pyl and 2Lt T Templeton posted in from 102 OCTU. |