What is planned and what actually gets built is often far from what is needed... and I have seen some real doozies (wheelchair ramps at 45 degs or greater for example). Surely there is a central point somewhere in the country with decent plans, etc. for modifications, etc. ?
As far as the "cage" is concerned, I'm shocked that there is no sunshade, SPF5000 dispenser, fire alarm, extinguisher, First Aid post or H&S posters in there!