Well, some fantastic news! I had the caravan checked yesterday, got lucky and inspector fitted me in. He's told me I have bought a good caravan! Average of 9% damp, couple of small patches on floor at 18, oven never used. Also tested appliances on gas all good. He did find small patch of dry rot inside front locker on one side but otherwise good condition. I'm going to see of he will repair the dry rot. Inspector advised me to go careful as he may just offer my money back instead of repair as van is good and price was right. I feel so so relieved. Doesn't affect fact it was dirty, but ive cleaned it now and feel reassured everything is OK. Actually slept last night. Thank you all. Any advice on the dry rot would be welcom it's inside the front outside locker, panel on side of locker offside.