One of the main activities was the stone loading operation. 12 wagon trains of empty hoppers arrived and the loco moved to a headshunt. Then the class 80 shunter took 4 wagons at a time to the loader, which was scratchbuilt in brass, and had an internal conveyor belt to deliver stone to the wagons.
Here, empty hoppers are arriving behins a class 60.
http://www.andersleymodelrail.co.uk/.../semange31.jpg
Here the shunter positions the wagons for loading. The stone can be seen falling into the hopper.
http://www.andersleymodelrail.co.uk/.../semange54.jpg
http://www.andersleymodelrail.co.uk/.../semange53.jpg
The loaded train departing behind a class 59
http://www.andersleymodelrail.co.uk/.../semange19.jpg