S2000 Musty and Mildew smell in cabin

[The Busman]

My newly acquired 2004 S2000 has a severe musty and damp smell in the cabin when the roof is closed. I bought the car from a dealership, but the car had the same owner for seven yesrs, only covering 1000 miles a year. Any ideas where to start? No obvious damp patches in cabin, roof in good condition. Thank you....

[The Busman]

Thanks dobly. Car goes back to dealer next week, so will ask them to check those specific points....... (Not sure about the cat, although there was a rabbit having a look at it underneath at the weekend,!)