Kidsoleman

The cylinders are for storage of liquid oxygen, Argon & Nitrogen (a liquid oxy line direct from BOC also fed the plant) . I worked on the plant for over 20 years as GKN then ASW and finally as Celsa and I was the engineer responsible for the the erection of the "new meltshop" in 2005. As was previously said they only used signal lights on the buildings entrances and they were red/green usually mirrored inside the buildings along with a klaxon to make the crane drivers and other staff aware a shunt was in progress. As Brian correctly said there was a barrier crossing across Rover way to access the then Birds scrap yard. The brick cabin contained the switch gear for operating the barriers and "wigwag" lights to stop the road traffic and green/red light signals for the shunt, it was unmanned and only accessed by the shunter who would operate the gates and lights from it. Regards Howard