Thank you Damien.
Yes,my meter is no where near as good as the professional people use but I think I should be able to moniter the levels with mine over the next few months.(Hopefully, it will gradually decrease).
With my 2013 Olympus,I understand its best to check the 4 corners of the floor,plus under seats,bed,cooker/fridge area?
Although I realise im past the 30 day reject(if applicable) timescale,but am I right that up to 6 months,the onus is on the dealer to prove there was no damp present when I purchased it?
Obviously a letter from the previous owner detailing the conversation he had with the dealers workshop when he traded it in,pointing out the damp,and then saying that in their opinion,with the level of damp,it had probably been leaking through the toilet cassette door for at least 12 months.
I was issued with an insurance based warranty when I purchased it,so im hoping that the damp levels will gradually decrease over time .
If they dont,then I suppose I have to make the decision to keep and let the insurance sort it,part exchange for another or (with the evidence I have)reject.