a British Railways Peak Sulzer class 45 with a passenger train on the Settle-Carlisle line

The appearance indicates it hadn't been cleaned for some time. In the background it looks like the Moorcock Tunnel.

A total 127 of the 1-Co-Co-1 type diesels were built over 1960-1962.  They were withdrawn during the 1980s and 11 are preserved.

More (steamingnorth.com pic)