The prof is quite correct in his post regarding any duty of care by Elddis the manufacturer as no contract exits between the manufacturer and the consumer especially as the caravan was bought privately.I've had another quote and this company have suggested it will need a full new panel which is £5-6,000 before they quote for any damp work! So suggesting I make a claim on my insurance. So at the moment I have a couple more quotes, have started a email to Elddis to make a claim based on it being a common issue because of a design fault and will be phoning my insurance company to understand their perspective.
Having never had anything like this before, it would be good to understand if I was to fix it myself, would allowing it to dry itself be okay once the water ingress had stopped or do I need to do something else. There's not really much of a water stain, but the moisture level is almost 40% in the worst places.
Can I suggest that you follow the advice given on this thread rather than waste time and money contacting Elddis?