Most of that was disposed of twenty years ago when the perceived need for civil defence went. The Nightingale’s have been furnished with modern equipment.
It’s a while since I posted the comment that you have quoted but I think my logic was that the NHS managed to find the 5000+ beds out of stuff it isn’t scaled to hold. Stuff that should have been disposed of.
In other words, the ability to quickly build emergency hospitals was good luck based on the results of poor management rather than proper planning.
I found myself wondering if there was a layer of Brokers batch ordering and storing kit which was then supplied "JIT" to the NHS.