Driver floor always wet after rain

What is your question?

Under 50k miles. Perfect condition inside and out. Had it since new, want to keep it. Had it to top jag mechanic and top body shop. Neither has been able to find the leak. It will rust through the pan if corrective action not taken. Any one know what to do?

What makes this problem better or worse?

N/a

How long has your 2002 Jaguar Vanden Plas had this problem?

Several weeks