I am working on finding British regimental details for Ireland 1798. This is what I have so far:
OOB Ireland 1798-99:
Cavalry:
4th Dragoon Guards
5th Dragoon Guards
6th Dragoon Guards (The Carabineers):
7th Dragoon Guards: “The Regiment was in Ireland when the Irish rebelled in 1798, as were consequently heavily engaged in policing duties throughout the rebellion.” : https://archive.org/details/cihm_48377 See pp.57-60.
5th Dragoons
9th Dragoons
22nd Light Dragoons
23rd Light Dragoons
24th Light Dragoons
Hompesch's Rifle Men [Hompesch's Dragoons 1798-1802]
First Fencible Dragoons [Fencible Cavalry in Ireland]
Second Fencible Dragoons [Fencible Cavalry in Ireland]
Ancient British Regiment
Berwichshire [Fencible] : https://en.wikipedia.org/wiki/Berkshire_Fencible_Cavalry
Cambridgeshire [Fencible]
Dumfrieshire [Fencible]
Laneashire [Lanarkshire?]] Lanark & Dumbarton
Lothian (Mid ) [Fencible]
New Romney (or Duke of Wales’ own) [Fencible]
Princess of Wales [Fencible]
Roxborough [Fencible]
Loyal Essex Regiment of Fencible Cavalry: “In 1797 when the French landed in Ireland, the Regiment moved to Ayr and were ferried to Ireland although the French had surrendered before the Regiment has reached the British Army lines.
They remained in Ireland until 1799 when they were disbanded no doubt to make way for the new provisional Cavalry.” : http://www.essexregiment.co.uk/cavfen.html
“In 1794 six troops of the 'Loyal Essex Regiment of Fencible Cavalry' (later to be renamed 'The Essex Light Dragoons') were formed from the Harlow area against threats of a French invasion with landings on the Essex coast.”
Infantry:
1st Foot Guards (3rd Bat.): “In 1798 the 1st battalion, having recruited its numbers, proceeded from Great Britain to Ireland.” http://www.gutenberg.org/files/49570/49570-h/49570-h.htm https://archive.org/stream/historicalreco00cann See p. 163. Also: https://archive.org/details/originhistoryfi01hamigoog/page/n410
Coldstream (1st Bat.)
For Ireland 1798: https://archive.org/details/originandservic00mackgoog/page/n91
3rd Foot Guards (Detachment)
Maurice. The History of the Scots Guards: From the Creation of the Regiment to the Eve of the Great War. 2 vols. 1934. xxii, 410; xi, 394p., 49 leaves of plates (some fold.): ill. (some col.), facsims., frontis., maps, ports. :
1st Regiment (1st Bat.): “The [1st] battalion remained in Saint Domingo until May, 1797, when it returned to England a mere skeleton, and was ordered to North Britain to recruit. After serving in Ireland and Scotland, it again proceeded to the West Indies in 1801.” Page 73 of: Wetherall. An historical account of his majesty's First, or the royal regiment of foot. 1832. 225 p. : https://babel.hathitrust.org/cgi/pt?id=nyp.33433006866259
Reprint 2018.
2nd Regiment (1st Bat.):
Ireland 1798 starts at: https://babel.hathitrust.org/cgi/pt?id=mdp.39015070524528&view=1up&seq=403 to p. 323.
Davis. The history of the Second, Queen's royal regiment, now the Queen's (Royal West Surrey) Regiment. Vol. 3: 1715-1799.
6th Regiment (1st Bat.)
13th Regiment (1st Bat.)
29th Regiment (1st Bat.)
30th Regiment (1st Bat.)
41st Regiment (1st Bat.)
54th Regiment (1st Bat.)
60th Regiment (5th Bat.)
68th Regiment (1st Bat.)
100th Regiment (1st Bat.)
Corps of Invalids in Ireland
Royal British Artillery
Bibliography:
List of British fencible regiments: https://en.wikipedia.org/wiki/List_of_British_fencible_regiments
FENCIBLE LIGHT DRAGOONS, 1794 to 1800. : https://en.wikisource.org/wiki/Page:Notes_and_Queries_-_Series_2_-_Volume_12.djvu/375
List of British fencible regiments explained. : http://everything.explained.today/List_of_British_fencible_regiments/
Ron McGuigan, Fencible Cavalry Regiments (of Light Dragoons) 1794–1799 at Napoleon Series: http://www.napoleon-series.org/military/organization/fencibles/c_fencibles1.html
White. A bibliography of regimental histories of the British Army. 1992. viii, 331 p.