Have you got damp issues? If you have mouldy, cold, condensation on your walls and damp stained.🥶 Check the damp proof course height. Has it been bridged by a path like this property? Has it been bridged by debris within the cavity, or even the plaster? Do you have a suspended timber floor? If so most properties have 2 vents at the front and 2 at the rear, are yours visible? Are they sleeved through the wall? Do you have little round holes where cavity wall insulation has been injected into you