Pembrey diesel

I did establish the identity of this little diesel. There were two and this was No.2. The rest has now slipped from my mental grasp! The photo was taken in the mid 1980s
I think I have now found my reference on the RMWeb site -
'Carmarthen Bay Power Station was located about a mile east of Burry Port and connected to the main line. The station ceased to produce electricity in about 1984, and the two Andrew Barclay 0-4-0DM locos were preserved during 1985. No.2 AB393/54 remained local, moving to the Kidwelly Industrial Museum, whereas No.1 moved to Norchard on the Dean Forest Railway where I snapped it about five years later.'
Comparing this photo with a close-up photo of No.1, mentioned above, they are similar but not identical. So I think that this is No.2.