York and Lancaster Regiment
| Dates | Locations | Higher Formation/Remarks |
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| . | The Hallamshire Battalion, The York and Lancaster Regiment | . |
| 1947.01.01 | Reconstituted in TA with HQ at Sheffield, and concurrently amalgamated with 6th Battalion | 146 (West Riding) Infantry Brigade |
| . | A Company at Endcliffe Hall, Sheffield | . |
| . | B Company at Endcliffe Hall, Sheffield | . |
| . | C Company at Endcliffe Hall, Sheffield | . |
| . | D Company at Endcliffe Hall, Sheffield; absorbed by other coys by 1958; new D Coy formed 1 Apr 1958 at Rotherham | . |
| 1960.02.25 | Absorbed RÂ Battery, 271 (Sheffield) Field Regt RA and 865 Locating Battery RA as B Company | . |
| . | A Company at Endcliffe Hall, Sheffield?; absorbed by C Coy?; new A Coy formed 1 May 1961 at Middlewood Road, Sheffield | . |
| . | B (Barnsley) Company at Barnsley, redesignation of R Bty 271 Regt RA | . |
| . | C Company at Endcliffe Hall, Sheffield | . |
| . | D Company at Rotherham | . |
| 1967.04.01 | Disbanded and concurrently reconstituted as separate units: | . |
| . | D Company (Hallamshire), Yorkshire Volunteers, in TAVR II, at Endcliffe Hall, Sheffield with dets at Rotherham and Barnsley | . |
| . | The Hallamshire (Territorial) Battalion, in TAVR III with HQ at Sheffield | . |
| . | A Company at Sheffield | . |
| . | B Company at Rotherham | . |
| . | C Company at Barnsley | . |
| 1968.12.07 | Regular element of The York and Lancaster Regiment disbanded, leaving the Hallamshires as sole custodians of regimental tradition | . |
| 1969.01.01 | TAVR III unit reduced to cadre at Sheffield as The Hallamshire Battalion, The York and Lancaster Regiment, sponsored by Yorkshire Volunteers | . |
| 1971.04.01 | Reorganised: | . |
| . | D Company (Hallamshire), 1st Battalion, Yorkshire Volunteers, in TAVR II, at Endcliffe Hall, Sheffield with dets at Rotherham and Barnsley | . |
| . | D (Hallamshire) Company 3rd Battalion Yorkshire Volunteers at Barnsley, reconstituted from cadre | . |
| 1975.04.01 | D Company 1st Battalion consolidated at Sheffield (yielding Rotherham and Barnsley to 3rd Battalion) | . |
| 1978 | D Company 1st Battalion formed detachment at Middlewood Road, Sheffield | . |
| 1987.01.01 | D Company 1st Battalion at Sheffield redesignated asÃÂ D (Hallamshire) Company 4th Battalion | . |
| 1988.01.01 | D Company 3rd Battalion at Barnsley redesignated as A (Hallamshire) Company 4th Battalion | . |
| 1992.04.04 | Reduced to HQ (Hallamshire) Company, 3rd/4th Battalion, Yorkshire Volunteers at Endcliffe Hall, Sheffield, by amalgamation of HQ Company and D Company 4th Battalion and HQ Company 3rd Battalion; (A Company 4th Battalion amalgamated with B Company (Sheffield Artillery Volunteers) and its Hallamshire lineage ceased) | . |
| 1993.04.25 | Redesignated HQ (Hallamshire) Company, 3rd Battalion The Duke of Wellington's Regiment (West Riding) (Yorkshire Volunteers) | . |
| 1999.07.01 | Amalgamated with B Company (Sheffield Artillery Volunteers), to form Fontenay Company, The East and West Riding Regiment, and Hallamshire lineage ceased | . |
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