Hi Paul and all
Was lucky enough to source a complete coil unit with points, condenser and the clip which holds the coil in place so many thanks to Paul for that important information, I think this is what put the mower into early retirement. It was strange that the coil is identical ( looks to be ) to the original with same name and part number but the name and number are opposite to the original.
I fitted the coil this afternoon and the Lightning now has spark ! in anticipation of a start I dropped the blade plate off and changed the engine oil. Nothing special about the blade plate, not sure what the diamond shapes in the plate are for but you can definitely fit 4 blades to the plate if desired. Luckily the blades are in good nik so will just give them a light sharpen. Need to now get a fuel bowl gasket, give the carb a basic clean, clean out the tank and fit a fuel tap, then touch wood will fire up. Picture clearly shows the clip location bottom right of coil.

Cheers
wce

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