Not anything specific. On even cursory inspection, none of these GWR, SECR, SR, LMS or LNER coaches look truly like anything that ever ran on this island. (Exception: LMS designs on the NCC, but mixed in with older flatosided BNCR stock!).
However, the height and positioning of the windows on some SR stock vaguely suggests MGWR, whereas some GWR and LMS designs have a vaguely GSWR (and therefore GSR, and CIE) look about them. The livery change helps hugely, of course.
By sheer luck, the Hattons 6-wheelers were very similar in overall styling to be close enough to several batches of GSWR 6-wheelers, hence the run of them that was done.
But, yes, a number 163M on that yoke certainly gives the right overall impression! Had considered that too myself. A former MGWR bogie in West Kerry in the 1950s is not beyond the bounds of possibility, because one was seen at kenmare on occasion, and also (possibly the same one?) visited Wisht Caark, boy, too!