37674 with the Serco track recording train.
The loco is also used for laying sandite - you can see the filler pipe at the lower left corner of the nameplate.
Behind the loco is former inspection saloon DB999508 which is now a recording coach.
The train is seen stabled after traversing the west Wales branches.

Carmarthen, 18 February 2004. Colin Baker (lokfuehrer@ntlworld.com)