So basically the battery was dying due to a faulty boot lock, car would start on the key if it had a good run otherwise I had to jump start. Managed to replace the bootlock and get the car into my garage to charge and now battery is ok - green light on Yuasa battery and it is getting charged by alternator and also CTEK charger says it's ok but it won't start on the key - it will do a single slow turnover at best and then click nothing but it still starts from a powerpack first time. I've been told this is probably a bad ground and/or the starter solenoid question is where do I check for bad ground and is it possible to just replace the starter solenoid or will it need a whole starter unit? I believe to get at the starter I have to take the front right wheel off?
Any help appreciated