Update,

Changed the leads and plugs, got fed up with fiddling about as the plugs are directly under the bonnet hinge with very little room to work so I took the bonnet off and what a difference this made.
Got the job done and routed the leads properly, put everything back and hey presto it runs like a dream.

Thanks to all for your input and help......

Why is there only one monopolies commission??

Rob B.