Meanwhile, taking photographs of something that is transparent isn’t easy, but I managed the one above by getting Miss P to hold a piece of black card to one of our windows. Can you make out the perfect circle with the ragged edge? Well we just spotted it this morning and are stumped by the phenomenon.
At first we thought it was some sort of sticker put there by one of the kids, but when I checked the window inside and out it became clear that the pattern is actually on the inside of the double-glazing. Weird. Has anybody else come acrosss these patterns?