Hi GQ,
Thanks for the picturesque report on BT's top secret classified underground storage facilities, the high-tech monorail surprises me somewhat, I was envisaging a 1930's era art-deco styled streamlined steam train.. attended by swiss engineers in full railway garb with highly polished oil cans at the ready... :)
Maybe like this one.
https://www.woodworkforums.com/attach...005-large-.jpg
That's says it all, style, design and function...
Regards
Ray