Just been out to the car and the battery was as good as flat, just about started.
The battery was fully charged on Tuesday with a battery health of 89%, driven 20 miles on Wednesday, 60 miles on Thursday, 4 miles on Friday evening, now barely able to turn the car over. Parasitic drain measured on Wednesday as 55-65mA, this should not have drained the battery.
Despite the battery tester telling me the battery has good health, am I right in thinking suspicion is on a duff battery?