Minister, that type too is unlike anything which ever ran here. By the time that the type of body design shown in both the pictures posted was the norm, six wheeled chassis were universal here. British lines kept on building four wheelers a great deal longer, leading to some of the beautifully restored examples on the Isle of Wight, for example.
On these boards a while back, someone showed how he had made a quite superb GSWR-like six wheeler by amalgamating a couple of those "Thomas" coaches to make one that was one and half times the length, and using a six wheel chassis. That's more like it for Ireland.
The initialing wheelbase four wheel shown in this post would do fine for many Irish lines if it was fitted with a six wheel chassis. It would look like many first class coaches (4 compartment) off the GSWR, or at a pinch West Cork or the DSER. It's not, however, convincing for NCC, BCDR, GNR or MGWR scenarios.