According to 'the Barry List' 4th Edition (published 1979 I think) there had been a diesel loco number D8026 broken up in 1970. It is described as a 'type 1' Bo-Bo.
Googling for this loco has proved inconclusive. The loco is not mentioned in any of the Barry Scrapyard websites that I'm aware of such as
Can anyone tell me what class of loco D8026 was?
John