I remember your warning, Matt. You turned off early that night, I recall, when you used to cycle all the way down to near Colliers Wood for an extra bit of mileage.
I sort of had a third sense about it a couple of months back and started bypassing Tooting by turning off at Clapham South and going through Wimbledon, in the evening rush hour. Should have trusted my judgement and stuck to it. Although roads are very narrow that way.