Just a safety point if I may about changing batteries.. You should always disconnect the earth lead (-ve) first and reconnect it last. This avoids the possibility of a slipping spanner on the +ve terminal shorting out on any adjacent earthed metal parts/body. Shorted batteries can explode and cause serious burns!
Leigh you like to make a simple job harder, why not get any old pair of wires 'coloured' and connect to earth, anywhere even exhaust if you so desire from your charger, and the pos,+ to the fusebox at the brown's entry point.
Did the same with my ZS for the same reason, did you (or the wife) put the battery clamp back on OK.
I bought a stainless steel one but it didnt clamp down correctly, only advisory I had on the MoT, battery insecure.
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