In April we had a service done which gave high floor readings from near the door down the centre of the van up to the sideboard. Bailey Unicorn Valencia 2015. The engineer came back this week with a different meter but still showing readings of 50+ in some parts low readings in washroom & bedroom no signs of damp on very edge throughout however 51 inches down middle of van from sink high readings but no signs of any leak thinks possibly from a spillage or old leak. Unsure what to do next we’re on a seasonal pitch until November will it likely dry out at all? Any advice appreciated.