I've got a small interior leak. Can't get any images now as I dont have a camera on me. But it seems to be coming out of the roof lining perhaps? just above the rear interior lights. This happened today as I pulled off in my car, and it happened on both sides of the vehicle. Think it may be rain water as its been raining heavily today but it's never done it before? doesn't constantly leak, just seems to empty itself then stops. Any ideas where this leak has come from?

I've lost the little ring on my aerial (as shown in pic in red). Don't suppose water can get through there can it?
thanks.