EWS Class 37/7.

Mainline Blue liveried 37798 comes off the Edinburgh Suburban freight line at Slateford station with an unidentified westbound engineers train on Tue 30th Mar 1999.
Photo and Scan: Ross Aitken (aos@cableinet.co.uk)
Website: http://wkweb4.cableinet.co.uk/aos/photography