Which Is Correct? If the Defendant in a Road Traffic Accident Was Uninsured

Which is correct?
If the defendant in a road traffic accident was uninsured at the time of the accident you should advise your claimant client:

A) Having checked the financial status of the defendant and discovered both that he is "a man of straw" with no assets or income and that he was uninsured at the time of the accident advise the client not to proceed as there would be little prospect of recovering either damages awarded or the costs of the action.
B) Go ahead with the action in the expectation that the defendant's previous insurers will have to pay both any damages and costs awarded.
C) Ask the defendant for the details of his insurers before commencing proceedings and give notice of any proceedings that are commenced to the Motor Insurers Bureau within 14 days of issuing proceedings with copy documents, then advise the client to proceed.
D) Ask the defendant for the details of his insurers before commencing proceedings and give notice of any proceedings that are commenced to the Motor Insurers Bureau within 7 days of issuing proceedings with copy documents, then advise the client to proceed.