There were a few others like that (3172 off the top of my head), however 3173 was changed (slightly) again when overhauled at Mullingar in the preservation era. Interestingly, I've vague recollections that while researching the vans for the RPSI website articles a few years ago I discovered that Graham Farish had actually modeled 3173 in its original BR identity as w21146.
Niles posted a topic in What's happening on the network?Friday 7th November The Blue Train "A private charter will see the Society's Cravens and an 071 diesel locomotive operate to Midleton from Dublin Connolly. As the passengers will not be returning on this train, we are able to offer the diesel-hauled one-way return leg to the railway enthusiast fraternity. The bar and buffet will be available. NIR's 112 has been requested (no guarantee) for a blue train out of Cork. Arr Dep Midleton -- 15:00 Cork 15:23 15:47 Dublin Connolly 18:51 -- Fare: €25 (Pay on the train)" Probably the first time a NIR 111 has been to Midleton (all going well) All profits from the trip go straight back into keeping classic loco hauled trains on the mainline