Well, it seems that fitting studded tyres has staved off the big freeze for the moment at least. There was a bit of ice around, especially on Mitcham Common, but nothing at all that I noticed after Figges Marsh. I felt very self-conscious, with my tyres doing their best impression of riding up a gravelled drive sweep, but, despite feeling very weary at first, I made good time. I even checked that the distance I'd clocked matched what I'd done previously on the same loop, to check that I had the computer set correctly. Passing RLJers on Borough High Street was a joy.
The Met Office are sticking by their predictions of sub-zero temperatures for the next couple of nights, so, unless it stays very dry, I'm expecting ice.