FELIX asked about CORK/DUB service in 2000. Took a while to find the WTT [valid from 09/06/2000]
From HSN :WEEKDAYS 0525 [MO]/0710/0820[SO]/1050/1320/1520/1605[FO]1710/1915-1930[FX-FO]2100
W/D From CK :0505/0705/0905/1045/1115[FO]1425/1730/1915
SUN X DUB :0950/1205/1320/1515/1750/1915/2100
SUN X CK:0820/1050/1400/1415/1630/1735/1830/1905
Mostly M3/ some M2, plus a railcar each way on Sun