My son has just brought a swift 460 se 04 model as his first van.It is the model with the "L" shaped lounge area.His first jaunt was last week to Norfolk where over the easter wk/end it snowed(7" in total!).By the 2nd day of snow,he noticed that the nearside cushions in the lounge were wet at the corner of the "L".The window had not been opened due to the bad weather.No leakage was noted on walls/windows over the whole of the wk/end and no obvious cause was apparent.The van is now on my driveway under "observation" and despite further wet weather no re-occurance as yet,has been noted.Has anyone else experienced this or offer explanation of cause?Help much appreciated.