The Loco's were frequently turned the 'wrong way' (Cab 2 end leading) especially when the Mark IV's arrived in the begining . From an operating point of view it didn't make any difference, as both Cab controls are identical, apart from the MU2 Cock which is located in Cab 1 (the bigger Cab) It was the Driver Reps that requested they all be turned correctly (which is done in Limerick Jct) as we felt there was a health & Safety issue when shunting the Mark IV's in the tunnel in Cork, as
(a) you had to change Cab ends in a dark, smoky tunnel to switch out/in the MU2 cock in the other Cab when changing direction
(b) if all the air in the brake pipes wasn't expended fully, the train would roll while you were changing Cab ends!
© The engine is directly behind Cab 2 so noise levels in Cab 2 were a lot louder than Cab 1.
It took a while to get them all turned so hence why you can see the mentioned photos.
Hope this helps....