Formed February 1920 as 4 East Anglian Brigade RFA (TF). Became 86 (East Anglian) Brigade RFA (TA) in 1921. It changed title in 1922 to 86 (East Anglian)(Hertfordshire Yeomanry) Brigade RFA (TA). In June 1924 it became 86 (East Anglian)(Hertfordshire Yeomanry) Field Brigade RA (TA). 86 Field Brigade was re-designated 86 (East Anglian)(Hertfordshire Yeomanry) Field Regiment RA (TA) in November 1938 with two batteries. In November 1940 a third battery was formed. Post war 86 (East Anglian)(Hertfordshire Yeomanry) Field Regiment RA (TA) went into suspended animation in April 1946 and was re-constituted as 286 (Hertfordshire Yeomanry) Field Regiment RA (TA) in January 1947.
Illustrations of the formation badges under which a unit served or supported are given. This is no guarantee that the unit used this formations badge.
| 3 Sep 39 |  |
54 Infantry Division | Hertford, Hertfordshire, UK |
| Nov 39 | |
54 Infantry Division | Norfolk, UK (On coast defence) |
| Feb 40 | |
54 Infantry Division | Chelmsford, Essex, UK |
| Apr 40 | |
54 Infantry Division | Whalton, Northumberland, UK |
| Oct 40 | |
54 Infantry Division | Rothbury, Northumberland, UK |
| Mar 41 | |
54 Infantry Division | Tewkesbury, Gloucestershire, UK |
| Jul 41 | |
54 Infantry Division | High Wycombe, Buckinghamshire, UK |
| Nov 41 | |
54 Infantry Division | Suffolk, UK |
| 10 Jun 42 |  |
42 Armoured Division | Slingsby, Yorkshire, UK |
| May 43 |  |
49 Infantry Division | Codford, Wilts, UK The Regt developed techniques for seaborne landings including firing from LCT’s on the run in. |
| Jul 43 | |
49 Infantry Division | Kilmarnock, Ayrshire, UK RHQ & 462 only. Remainder joined Aug 43. |
| Dec 43 | |
49 Infantry Division | Norwich, Norfolk, UK |
| Feb 44 |  |
2 Army Attached 50 Infantry Division |
Norwich, Norfolk, UK |
| Mar 44 |  |
2 Army | Bournemouth, Dorset, UK |
| 6 Jun 44 | |
2 Army | Normandy, France |
| Sep 44 | |
2 Army | Antwerp, Belgium |
| Oct 44 |  |
attached 82 (US) AirBorne Division | Nijmegen, Holland |
| Dec 44 |  |
attached Guards Armoured Division | Ardennes, Belgium |
| Mar 45 | |
2 Army | The Rhine, Germany |
| Apr 45 |  |
attached 3 Infantry Division | Bremen, Germany |
Batteries
| 1921 | 341, 342, 343, 344 |
| Nov 38 | 341, 342, 344 – 336 Battery absorbed by 344 & later re-formed |
| Nov 38 | 341 (St Albans), 342 (Hertford) – 336 & 344 Batteries to 135 Field Regiment |
| 8 Nov 40 | 341, 342, 462 (462 Bty was originally 343 (unofficial) until Jan 41) |
Equipment
| Sep 39 | 8 x 4.5 inch Howitzer, Morris Commercial CDSW Tractors |
| Jun 40 | 8 x 4.5 inch Howitzer & 4 x 18/25 pdr gun |
| Jul 40 | 6 x 4.5’s converted to pneumatic tyres |
| Aug 40 | 341 Battery, 1 troop 4 x 4.5’s, 2 troops as infantry 342 Battery, 1 troop 4 x 4.5’s, 1 troop 4 x 18/25 pdr, 1 troop as infantry |
| Sep 40 | 341 Battery, 2 troops 4 x 75 mm guns each, 1 troop 2 x 60 pdr 342 Battery, 2 troops 4 x 18/25 pdr each, 1 troop 2 x 60 pdr |
| Oct 40 | 60 pdrs returned, Quad tractors & Carriers Universal MkI issued |
| May 41 | 16 x 18/25 pdr, 8 x 75 mm gun |
| Jan 42 | 24 x 25 pdr |
| Mar 43 | 24 x 25 pdr Self Propelled Bishop |
| May 43 | Crusader Observation Post tanks |
| Aug 43 | M7 105 mm Self Propelled Priest |
| Feb 44 | 25 pdr Self Propelled Sexton |
| Mar 44 | Sherman MkV OP/CP, Carrier AOP, Jeeps & M14 Half-tracks |