| January 1940 | CO: Lt Col Sir Ronald Ross |
| Jan 40 | North Irish Horse |
| 2/1/40 | Enniskillen
Visit by Major General RV Pollok CBE DSO, GOC NID. |
| 3/1/40 | CO admitted to hospital, Capt Smith-Bingham assumes command. One Sgt and 2 ORs posted from 57th Hvy Trg Regt RAC. |
| 5/1/40 | SSM Allen RTC posted from 57th Trg Regt. |
| 6/1/40 | Strength 233 ORs, HQ Sqn 128, A Sqn 108. |
| 7/1/40 | Church parade as strong as possible. |
| 10/1/40 | 3 Armoured cars taken on strength. |
| 12/1/40 | 2Lt Adams transferred to HQ Sqn. |
| 16/1/40 | RSM Beales, one CQMS, 2 Sgts, 1 Cpl, 8 ORs posted in from 55 Trg Regt. |
| 17/1/40 | Four Cpls promoted to A/Sgt. Nine LCpls to A/Cpl. |
| 18/1/40 | Regt now formed into three service Sqns and HQ Sqn.C Sqn formed by splitting A Sqn, B Sqn formed by splitting HQ Sqn. B & HQ Sqn at Castle Bks and McArther Hall, A & C Sqns at County Hall and Orange Hall.Officers appointed as under: A Sqn Capt Lord O'Neill C Sqn Capt Sir N Stronge 2Lt Herdman 2Lt Coey 2Lt Montgomery 2Lt CroftonB Sqn Capt Booth HQ Sqn Capt Newton 2Lt Pomeroy 2Lt Marquis of Ely 2Lt Butler 2Lt Adams 2Lt Nugent |
| 19/1/40 | 45 recruits enlisted, Regt strength 284 A Sqn 54 C Sqn 54 B Sqn 52 HQ Sqn 130Capt Sir N Stronge granted a further period of sick leave. Orange Hall converted into a temporary reception station and after an offer of assistance of VADS from County Hospital accepted.Total number of tonsillitis cases 78. |
| 20/1/40 | Visit by Major General Pollok and ADMS Col Gibbon. |
| 22/1/40 | 2Lt Coey promoted Capt wef Jan 1st.Major the Earl of Erne returns from course and assumes command. |
| 24/1/40 | Lt Col Sir Ronald Ross relinquishes command and is placed on General List |
| 25/1/40 | 40 ORs granted sick leave. |
| 27/1/40 | 3 ACs taken on strength.
Regt Strength:-
| A Sqn | Officers | 3 |
| | WO | 1 |
| | Sgts | 3 |
| | Cpls & ORs | 49 |
| B Sqn | Officers | 4 |
| | WO | 1 |
| | Sgts | 4 |
| | Cpls & ORs | 45 |
| C Sqn | Officers | 3 |
| | WO | 1 |
| | Sgts | 5 |
| | Cpls & ORs | 45 |
| HQ Sqn | Officers | 7 |
| | WO | 4 |
| | Sgts | 9 |
| | Cpl & ORs | 147 |
|
| 28 – 29 | A further 25 to 30 ORs proceeded on sick leave.
|
| 30/1/40 | 5000 rounds of SAA received from OO. |
