From the July 1979/January 1980 - Passenger Trains pictures

25066 readies for departure with the Edinburgh train on a cold January morning.

Class 25 locos were not the first choice of power for Scottish trains, notwithstanding what this website might suggest!  That's what made it even more exciting for me when I would find one on a passenger train.  Here 25066 is captured in the bright sunlight of a cold winters morning.  However, assuming the some of the steam is making its way into the coaches then the passengers are not going to feel that.