There's no way that would work, or no one would ever get done for driving without insurance.
Surely by error.
I reckon his options are take the points and fine OR take it to trial and explain it was genuine error and give a sob story about needing it to get to work / take his relative to hospital and can't afford the standard fine. The judge might show leniency, but then again they might not and it will work out even more expensive. He is bang to rights either way.
Either way he needs the car properly insured before they will release it back to him, and he needs to tell his insurers what he got from the ne for and what the penalty was or his insurance will be invalidated.