Just a few examples come to mind, after 1958 some of the locomotives that passed to CIE found themselves working suburban trains on the DSE line to Bray, examples being S and U Class, such as No.199 captured by O'Dea at Carlisle Pier.
A few acted as pilot engines in Kingsbridge, and ventured to Portlaoise on run-in trips, based either in Inchicore or Broadstone. Workings from Kingscourt afforded some locomotives to travel via the MGWR's Meath Road to Dublin also.
The few that did railtours ended up in unusual locations, such as U No.197 running to Mountmellick and Castlecomer/Wolfhill, Q No. 132 to Athlone via Moate (Kingscourt as well on an earlier trip), and VS No.207 and S No.174 to Cork. No.199 itself did a tour to Wicklow Murrough.
There could have been others but these are some I thought, very interesting topic