Brilliant, brilliant stuff!
The teak coaches look just right, as I recall them. A point of detail: while the UTA put red hand roundels on a few railcars still in GNR navy and cream, older wooden coaches would only get the UTA logo if painted green.
On this scale, though the UTA logo looks a bit overscale, and could at a distance look like a faded GNR crest!
Excellent work as always.
I have struggled to think of a reason to bring something UTA to my layout, based at the same period - but, while the location is fictitious, it's somewhere in the south - think Mallow-Waterford or South Kerry area. Maybe a visiting pigeon special!