I know where to contact Paul Lowery as we bought the van from them
If you have any contacts at Hobby UK , I would be happy to take it up with them, on the basis that the more who complain the more likely Hobby will take this up and fix it. Please pass me any contacts you have and I will take it up with them.
Our windows may be warped as they don’t fit flush as they should , and I suspect it will only be a better of time before they do leak
Ours is a 2013 MY year unit , but sold unregistered in 2015. Therfore I would be pursuing a manufacturing defect under the terms of the warranty