They're taking down the Christmas decorations at work. It's OK though because outside there's natural tinsel.
Every spider's web has been strung with spiky crystals and even the most mundane objects (top of a parking meter) have an icy crown.
I had another run this lunchtime where I wished I'd been able to take my camera along for your benefit. The frozen fields were the colour of sea glass and the river was a perfect blue mirror. At one point a swan flew low along it, its real and reflected wings together making a perfect O at the bottom of the wing beat. All the noises are clearer and sharper in the still air too, the quacking of ducks under the bridge sounds like the chattering of stones in a noisy beck.