Also, I managed my best time for the ride in to work, just under 37 minutes to the entrance to the loading dock at my workplace.
The ride home (also in the dark, a balmy 15° though) was pretty good too - total time for the day was under 82 minutes.
 Not including time stopped e.g. at lights, waiting for cars to get out of my way, etc.
 For this particular route, and from this house, and to this particular work address ... which covers most of the time since last December.
 My route is about 19.5km, and has 100m of climbing and 200m of descending on the way in, and vice versa on the way home.