Starter motor would not turn over. Instead breaker Q16 trips out. Jon says this has happened since he's known the boat (3 years). He concluded it is the electronics responding to a very low voltage in the battery (around 7 volts). He loaned us a battery and everything so far seems good. Question for Aqualine (or the circuit diagrams) is whether the inverter/charger charges the starter battery as well as the leisure batteries, or if it needs a charge from the alternator.
Great Haywood to Stone. 9 miles, 5 locks, ~5 hours engine time.
Hot water from engine was good. Bread maker worked well. Got the Murso going in the evening with considerable help from firelighters. Taybrite is pretty damp.