Well JohnS will be happy to hear that I managed to grind through the armchair welds and get out into the workshop again today although the sparks did damage my slippers a bit.
Drilled the holes in the woodwork which had been clamped up overnight while the glue set and had a trial assembly.
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Engine seems to fit OK too
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Since then I have shortened the coach bolts and made some coach screws to go in the rear axle brackets and hold the engine to the cart. Still needs a wooden battery box up fromt but that will have to wait for another day as the armchair is getting cold.
J