I too would like to recommend Dave Reilly at Plastercare 07932 505589. Dave sorted out my damp wall. He came over to look at it, identified the problem and gave me a price and a date when he could do the work. He arrived on the agreed date, removed the damp, re-plastered and sealed the section of the wall and injected it. The wall is now fine and I have been able to repaint it. Dave was very helpful throughout.