Drying clothes and managing humidity
After having a retrofit and home energy planner survey, we discovered that the soot lines that track the ceiling timbers on the surface of the plaster ceiling is from internal condensation : created from cooking and drying our clothes on the radiator by the back door.
We have been advised to dry the clothes elsewhere ( possibly the bathroom where we do have plenty of room to put clothes on a drying rack or an airer to use with a dehumidifier or humidistat wall extractor.
This is what I have found so far. Any other thoughts would be appreciated.