Well, it’s the OE one that ceased yesterday, not much warning either, bit sluggish to start in the morning and all ok whilst driving about. Once left for about 4 hours went to start it and clicky, clicky, clicky. OBD showed 11.4 volts. It’s 8 years old now so about due for a new one. £110 from Halfords but at least it’s a Yuasa with a 5year warranty.