We started chipping away the bottom 100cm of plaster from all bottom floor rooms in preparation for the tanking and were chuffed to bits to find a couple of open fireplaces with large yorkshire stone lintels emerge.  

The old plaster was in a pretty poor condition so came off quite easily (lots of horse hair in there) and the brick's underneath seemed to be holding some damp which began drying out in front of our eyes as soon as it was rid of the plaster.  We began to toy with the idea of getting rid of all the old plaster from the inside of the house so that the whole carcass could breathe and completely dry out; it would also give us the opportunity to repair any hidden damaged brickwork and re-plaster a blank canvas.

The silicone injected damp proofing had caused more problems than it had solved for sure . . .