Thank you for the reply and information. I haven't taken off the battery cover yet. I dont drive my car during the week as I work long hours and get back late. It's been a little wet so haven't been able to do the window test yet. I had a brief look in the boot with a torch last night and there was actually a little mould now beginning to form on the interior!Puma case is when a car goes back for repair for a known fault, it tells garage how to fix the fault, but in my case it failed again, I had to have all drain pipes replaced and re routed, the Puma case tell them to drill hole under skirt both sides where drains are. Have you taken your battery cover off and checked bay? And put your back windows down dry to see if they come back up wet
The car is going in on monday but I want to be as informed as possible to argue that this is clearly a design fault.