Sorry, can’t get better pics at moment, but think I have found the cause of the damp downstairs.
the path next to the gable wall is sloped from the middle of the house to prevent water pooling. But whoever put the path in built it up to level and slightly over the original slate DPC. I know...
So I live in a house buuikt in 1890. It’s an end terraced house down the side of the house the bottom course of bricks is very weathered and the mortar is in a bad way. The side of the house is rendered above the DPC.
There was a an injection damp proof course done before we moved in and all...