I wish to recommend Dave Reilly, I contacted him via this forum, he arrived promptly was very polite and professional. As it turned out the damp I was worried about didn't require extensive treatment, he offered an explanation and advice and went on to offer to advise my painter and decorator as to what materials he could use to prevent recurrence. This was all done with a smile and free of charge. I was most impressed. Thank you Dave if you read this. Tel no 07932505589