With my (until now) repressed Blue Peter creativity spirit I decided to hack up some decorating sheets and add some eyelets and shower suction hook suckers to create a covering for the outside of my (south facing) windows.
The bedroom coverings are suckers at the bottom and eyelets plus ribbons at the top so they can be lowered to different heights. Unsure if I will stick with this or go 100% suction.
Today the temp inside is 21 and outside it is 34 degrees. Inside curtains are also closed.
So far so good, they have not dropped off. No idea what might happen in a stiff breeze or when the heavens open. We shall cross that bridge when we come to it.