Hertfordshire Regiment
| Dates | Locations | Higher Formation/Remarks |
| . | . | . |
| . | 1st Battalion, The Hertfordshire Regiment | . |
| 1947.01.01 | Reconstituted in T.A. with HQ at Hertford and concurrently amalgamated with 2nd Battalion | 159 (Welsh Border) Infantry Brigade |
| . | A Company at Hertford | . |
| . | B Company at Hemel Hempstead | . |
| . | C Company at Bishops Stortford | . |
| . | D Company at Hitchin | . |
| 1958.06.02 | Transferred to the corps of 3rd East Anglian Regiment (16th/44th Foot) without change of title | . |
| 1961.04.01 | [Hertfordshire coys], 1st Battalion, The Bedfordshire and Hertfordshire Regiment [TA] (formed by amalgamation of The Bedfordshire Regiment, and The Hertfordshire Regiment, part of the corps of 3rd East Anglian Regiment (16th/44th Foot)) | . |
| 1964.09.01 | Transferred to the corps of The Royal Anglian Regiment | . |
| 1967.04.01 | Disbanded and concurrently reconstituted as two Higher Formation: | . |
| . | Part of 3rd (16th/44th Foot) Company, 5th (V) Battalion, The Royal Anglian Regiment, formed in TAVR II at Chelmsford (Essex) | . |
| . | No. 1 (Hertford) Company, The Bedfordshire and Hertfordshire Regiment (Territorials), formed in TAVR III at Hertford | . |
| 1969.04.01 | No. 5 (Hertfordshire) Company, 5th (V) Battalion, The Royal Anglian Regiment at Hertford and Hemel Hempstead, formed from personnel of TAVR III element as it reduced to cadre as The Bedfordshire and Hertfordshire Regiment at Hertford, sponsored by 5th (V) Bn, The Royal Anglian Regiment (and 3 Coy continued only Essex lineage) | . |
| 1978 | No 5 Coy redesignated as 5th (Bedfordshire and Hertfordshire) Company (5 RAR) | . |
| 1988 | 5th Coy redesignated as 4th (Hertfordshire) Company (5 RAR) | . |
| 1992.04.01 | B (Bedfordshire and Hertfordshire) Company, 7th (V) Battalion, The Royal Anglian Regiment. Formed at Hertford with pln at Dunstable and Hemel Hempstead, amalgamation of 4 Coy 5th Battalion and Dunstable pln B Coy 6th Battalion | . |
| 1999.07.01 | E (Essex and Hertfordshire) Company, The East of England Regiment. Formed at Chelmsford with Pln at Hertford by amalgamation of C (Essex) Coy, 6th Bn and B Coy 7th Bn, The Royal Anglian Regiment | . |
| 2006.04.01 | E (Essex and Hertfordshire) Company, 3rd Battalion, The Royal Anglian Regiment at Chelmsford with Pln at Hertford | . |
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