On a Milford Haven-Swansea service. Is that another ex GWR Cornish Riviera Express coach in West Wales?

Whilst many of the "Manors" spent lengthy periods working the Cambrian network 7811 "Dunley Manor" does not appear to have been allocated to Aberystwyth during its lifetime, the location for the class working the Cambrian, but in the mid ' fifties was shown as being at Shrewsbury, one of three of her class there at that time. By 1962 it was off Croes Newydd but came to South Wales, initially Llanelly then Neyland early in 1963. Therefore either the date is incorrect or it actually moved south unofficialy a little earlier, I suspect it is a dodgy date as it carries the 87H Neyland shed plate.