The Dreaded Damp

Jillyflower

We have a problem with damp in the back wall, near the sink in our newly-acquired Elddis Jetstream Ex300.  Can anyone please recommend someone in the Grantham area who can rectify this for us.  We don't mind paying a reasonable amount of money, as the rest of the caravan is lovely and we feel it deserves to be brought back up to scratch.