If its of any use I can offer the following; a day return from Sheffield to Glasgow, 18th January 1977.
45103 (0124 seems to ring a bell but not 100% sure)Sheffield to Leeds, 45012 forward to Glasgow. The train was the 2130 St Pancras - Glasgow Central, presumably dual heat stock, cannot recall the EH but do recall the leaking steam.
Returned south on the 1610 to Leeds, steaming with 45016.
Also involved 40049 to Perth, 40166 to Edinburgh for a couple of runs with tnt 27's.
A particularly pleasant memory for me.
GKPC