We've got a south facing conservatory and while it looks out onto a well shaded garden, it traps heat like nothing else at midday. Its only partially got blinds, so this evening we are getting the ladder out of the shed and coming up with a plan to block the rest of the windows from Saturday evening, either with cardboard or sheets. I dont expect it to be perfect, but something will be better than nothing.
May take the Furminator to the cats while Im at it - shedding all over the place lately!