Well as the ZS has an MOT I wanted to say a big thank-you to Drew for helping me out with this - potentially a nightmare of amount of work by taking on a car he'd not even seen, with no description of condition available either!
Thankfully for him (and me!) turned out to be less troublesome than feared!
So again Many thanks for the offers of help, and finally getting the car back on the road
Brillant news :-)
P.
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Forced Induction Is The Way To Go