1 Regiment
| Dates | Location | Higher Formation / Notes |
| 1 Training Regiment | ||
| 1946 | England: Merebrook Camp, Malvern | Formed from 1 Training Battalion |
| 1959.01 | England: Southwood Camp, Cove | |
| Feb 59: Absorbed 6 Training Regiment | 27 & 28 Trg Sqns transferred from 6 Trg Regt | |
| May 59: Absorbed 9 Training Regiment | 57 Training Squadron from 36 Regiment | |
| 1960: 57 Trg Sqn disbanded, C Trg Sqn became 57 Trg Sqn | 27, 28 and 57 Trg Sqns | |
| 1962: Regiment absorbed 4 Training Regiment with 55 Training Squadron and 56 (MT) Squadron (which remained at Aldershot). HQ Sqn formed. | 27, 28, 55 Trg, 56 (MT), 57 Trg & HQ Sqns | |
| 1963: 56 (MT) Squadron moved to Crookham | ||
| 1968: Regt reorganized and 3 Trg Regt reformed, 56 (MT) Squadron and 57 Trg Sqn transferred to 3 Trg Regt. | 27, 28, 57 Trg & HQ Sqns | |
| 1973: 27 Trg Sqn disbanded and HQ Sqn renamed 27 HQ Sqn | 28, 57 Trg & 27 (HQ) Sqns | |
| 1977: 1 and 3 Trg Regts reorganised, 55 Trg Sqn transferred to 3 Trg Regt and 56 (MT) Squadron transferred from 3 Trg Regt remaining at Crookham. | 28 Trg, 56 (MT) & 27 (HQ) Sqns | |
| 1979.02 | England: Gibraltar Barracks, Camberley: 56 (MT) Squadron remained at Crookham | 28 Trg, 56 (MT) & 27 (HQ) Sqns |
| 1979: 27 HQ Squadron disbanded and replaced by a HQ Troop | 28 Trg, 56 (MT) Sqns | |
| Sep 79: 56 (MT) Squadron moved to Gibraltar Barracks, Camberley | ||
| 1980: 27 HQ and Volunteer Trg Sqn formed from HQ Troop | 28 Trg, 56 (MT) & 27 (HQ) Sqns | |
| 1994: Amalgamated with 3 Training Regiment to form 3 RSME Regiment | ||
| 1 RSME Regiment | ||
| 1994 | England: Brompton Barracks, Chatham | |
| Formed by amalgamation of Depot Regimentand 12 RSME Regiment | 24 and 36 Trg Sqns | |
| c2004 | England: Brompton Barracks, Chatham | 24 and 36 Trg Sqns |
| 1 Division Engineers | ||
| 1960.07 | Germany: HQRE 1 Div at Verden | 1, 4 & 7 Fd Sqns and 45 Fd Park Sqn From 5 Division Engineers |
| 1961: 7 Fd Sqn transferred to 2 Div. 26 Armd Engr Sqn at Hohne came under command 1 Div. | 1 & 4 Fd Sqns, 45 Fd Park Sqn & 26 Armd Engr Sqn | |
| Jan 62: 4 Fd Sqn moved to Nienburg remained under command. 1 Fd Sqn moved to Nienburg remained under command. | ||
| 1962: HQRE 1 Div moved to Assaye Bks, Nienburg | ||
| 1962 | Germany: Assaye Barracks, Nienburg | 1 & 4 Fd Sqns, 45 Fd Park Sqn & 26 Armd Engr Sqn |
| Mar 65: 26 Armd Engr Sqn transferred to 32 Armd Engr Regt. | 1 & 4 Fd Sqns, 45 Fd Park Sqn | |
| Jan 68: 45 Fd Park Sqn became 45 Fd Sp Sqn. | 1 & 4 Fd Sqns, 45 Fd Sp Sqn | |
| Apr 69: Reformed as 21 Engineer Regiment | ||
| 1 Armoured Division Engineer Regiment | ||
| 1978.04 | Germany: Assaye Barracks, Nienburg | 1, 4 and 7 Field Sqns and 45 Sp Sqn From 21 Engineer Regiment |
| 28 Mar - 26 Jul 79: Northern Ireland Tour: Lurgan/HMP Maze/Portadown | Infantry Role: Less 1 Fd Sqn | |
| 23 Jun - 25 Oct 78: 1 Sqn Northern Ireland Tour: Ballykelly | ||
| Apr - Jul 79: 7 Sqn Northern Ireland Tour: Lurgan | ||
| Apr - Jul 79: 4 Sqn Northern Ireland Tour: Portadown | ||
| Jul - Nov 79: 45 Sqn Northern Ireland Tour: Maze Prison Guard Force | ||
| 6 Nov 80 - 20 Mar 81: 7 Sqn Northern Ireland Tour: Ballykelly | ||
| Jan 81: Renamed 21 Engineer Regiment | ||
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