Originally Posted by
pschlute
It is grade 2 listed, so will continue to be preserved. It is looked after by a group of volunteers, most of whom are retired engineers who worked here.
One fact I found fascinating was that when in use it was powered by two huge rechargeable batteries ! As it's function was to manage the supply of power from three points on the national grid, it could not afford to be affected by a power cut itself.
I remember key and lamp units myself, from my early days at work. Did you notice the even older switchboard on the left, complete with wind up handle ?