My son in law, opened the box and 3 chicks complete with feathers were in there dead. Obviously, poor little things died of the heat. They are going to buy 2 new boxes made by Schwegler. these are made of concrete and clay, and so keep the temperature ambient, they also have a 25 year guarantee !. They will be relocated to parts of the garden which get some shade, not easy when south facing.
But at least that solves their Christmas present, as I will get them one
thanks for your interest, Mrs B