Manufacturers warn against covering storage heaters at all times. However, since much of its heat is lost during the day after the "Economy" charging 7 hours, by the time night comes and the room temperature has dropped, the core is cooler than one would wish. I can see no safety problem in insulating the SH after the charge period with some sort of simple cover, which does not interfere with any grid in the casing, before removing it in the evening and thus benefiting from a higher core temperature when heat is in greatest need. Am I missing something?