For The Love Of Port

Thanks everybody for your assistance, I will get you the details of the bottles, the environment etc, just got to get through Christmas first!

Dear "FTLOP", I have recently taken on an exciting new role as House Manager of a private estate and there is a collection of Port Wines in the Cellar, stored on their side in a wine rack. The issue I have is that a number of them are leaking slowly. This has apparently been going on for a...