Quite a lot of drizzle during the day, and the overcast sky meant the solar panel did nothing to stop the batteries dropping. But I ran the engine only from about 4.30.
Wandered again, a bit aimlessly, around some of the city, and walked down The Shambles.
Got in touch with Keadby lock keeper, who was helpful in thinking about tides and times.
0 miles, 3 engine hours