There were some pretty good TV ads again this Christmas. Amidst all the festive Paddingtons, smiley-faced brown boxes and monsters under the bed, my favourite was a simple affair: a couple about to go out the front door, when a call comes cancelling the dinner party. Oh, joy! The silent hopping with delight, stripping off coats and scarves, whilst relaying regretful sounds into the phone. Do you love it when that happens?