| Dates | Locations | Batteries | Remarks |
| | | |
1947.04.01
| RHQ 10th Field Regiment RA at West Riding Bks, Dortmund was retitled RHQ 40th Field Regiment RA with 78, 109 and 129 Fld Btys redesignated from 30, 46 Fld Btys, and 51 Bty of 51/54 Fld Bty respectively. | | |
| 1947.04 | Germany: West Riding Bks, Dortmund | 78, 109 and 129 Fld Btys | Sexton 25pdr then 25pdr |
| 1954.10 | Egypt: Suez (Geneifa) | 78, 109 and 129 Fld Btys | 25pdr |
| 1955.02 | Cyprus: Famagusta | 78, 109 and 129 Fld Btys | 25pdr |
| 1958.03 | Germany: Portsmouth Bks, Munster | 78, 109 and 129 Fld Btys | 25pdr |
| 1 Apr 58: 78 Bty S/A (later in 50th Regt RA), 109 Bty S/A, 137 (JAVA) Fld Bty resuscitated (late of 27th Field Regt RA) and 38 (SERINGAPATAM) Bty resuscitated (late of 15th Medium Regt RA). | 38, 129 and 137 Fld Btys | |
| | 7 Feb 61: 129 Bty converted to a medium bty equipped with 5.5” Gun | 38 & 137 Fld & 129 Med Btys | 25 pdr & 5.5” Gun |
| 1965.06 | England: Wing Bks, Bulford | | |
| 18 Jun 65: Redesignated 40th Light Regiment RA | 38, 129 and 137 Lt Btys | 105mm Pack Howitzer |
| | Sep 65 - 1966: Borneo: Various Locations | | |
| 1969.07 | Germany: Mansergh Bks, Gutersloh | | |
| 9 Aug 69: Redesignated 40th Field Regiment RA | 38, 129 and 137 Fld Btys | Abbot 105mm Self propelled Gun |
| 22 Feb - 25 Jun 73: Northern Ireland Tour - Belfast (Ballymurphy) | | |
| 3 Mar - 4 Jul 75: Northern Ireland Tour - Belfast (City Centre/Markets) | | |
| Feb 77: 49 (INKERMAN) Battery joined the regiment. | 38, 49, 129 and 137 Fld Btys | |
| | 20 Sep 77 - 12 Jan 78: Northern Ireland (Ardoyne/New Lodge) | | |
| 1981.03 | England: Kirkee Bks, Colchester | | 155mm FH70 Field Howitzer |
| Mar 81: 49 (INKERMAN) Bty to 47 Regiment | 38, 129 and 137 Fld Btys | |
| Mar - ? 82: Belize (38 Bty) | | |
| Apr - Dec 82: Falkland Islands (137 Bty) | | Apr 1982 - Light Gun (For Tours) |
| | Dec 82 - ?: Falkland Islands (129 Bty) | | |
| 1985.04 | Germany: Haig Bks, Hohne | 38, 129 and 137 Fld Btys | 155mm M109 Self Propelled Howitzer |
| Apr 85: Took under command 10 Air Defence Battery from 45 Regt | 10 AD, 38, 129 & 137 Fld Btys | Javelin Missile System (10 Bty) |
| Oct 87 - ?: Northern Ireland (137 Bty) | | |
| Oct 90 - Mar 91: Gulf War, fought in Iraq and Kuwait | | 7th Armoured Brigade |
| 11 Jan 93: Regiment reorganised as a result of 'Options for Change'. 10 Bty to 47 Regt, 6/36 Fld Bty joined, 49 Bty joined and was redesignated 49 HQ Bty | 6/36, 38, 129, 137 Btys & 49 HQ Bty | 155mm M109 Self Propelled Howitzer |
| | Apr 93: Renamed 40th Regiment Royal Artillery | | |
1993.05
| Germany: Caen Bks, Hohne
| 6/36, 38, 129, 137 Btys & 49 HQ Bty | 155mm M109 Self Propelled Howitzer
|
| Sep 1994 - Bosnia (Radar Troop) | | |
| Sep 94 - Mar 95: Radar Troop to former Yugoslavia as part of Op Grapple | | |
| Oct 94: Regt handed over its M109's to the Austrian Army, re-equipped with 155mm AS90 Self Propelled Howitzer | | 155mm AS90 Self Propelled Howitzer |
| Jan 95 - ?: Northern Ireland (Girdwood Roulemont Battalion) | | |
| Jan 96: Radar Troop deployed to Bosnia, part of IFOR along with fifty other members of the Regiment who were attached to 26 Regt | | |
| | Jul - ? 97 - Bosnia | | SFOR |
1998.08 | England: Alanbrooke Bks, Topcliffe
| 6/36, 38, 129, 137 Btys & 49 HQ Bty | 155mm AS90 Self Propelled Howitzer
|
| Jul 99 - Jan 00: Bosnia: Op Palatine | | SFOR |
| Jul -? 01: Bosnia/Macedonia (129 Bty), Kosovo (6/36 Bty) Op Agricola | | |
| Jul - ? 03: Iraq 'Op Telic 1' | | Part of regiment deployed |
| 2003: Iraq 'Op Telic 2' | | |
| Jun - ? 04: Cyprus (UN) 'Op Tosca' | | |
| | 2006 - 2007: Iraq 'Op Telic 9' | | |
2008.09
| Northern Ireland: Theipval Barracks, Lisburn
| 6/36, 38, 137 Btys & 49 HQ Bty | Light Gun: Sp to 19 Light Brigade
|
| Apr - ? 09: Afghanistan: Op Telic | | |
| | | |