The timber railings on the verandah we are replacing didnt stand the tests of time, so I was hoping for aluminium or as mentioned PVC. However this seems really hard to find, unless I settle for a contemporary chrome type number. Can anyone suggest a supplier of PVC or aluminium railings please?

Though I don't know for certain, I think the cotton/linen shades are removable. I wasn't able to determine this by my searches. This could easily be confirmed by making an enquiry to supplier before purchase. Alternatively, a handmade one could be made removable by making shade slightly larger than frame and making ties.

I think you need to rework your plan a bit. A skylight in bedroom could be problematic in summer if you want to sleep in or go to bed early. However, I agree with council saying that the room needs light and air. Is it possible to put an opening in the patio roof?

https://www.ikea.com/au/en/p/fado-table-lamp-white-20455438/ comes in 17cm and 25cm sizes.