It’s the original Victorian wall that is the back of the original kitchen that backs onto the neighbouring property. Thanks for the guidance on a DPC paint or similar. What would the indicators be if this was mould / damp? Using a damp meter?
I noticed some ants coming from behind the fridge so pulled it back and noticed that the brickwork below the plaster appears black with a few gaps that looks like they lead down below the floor.
I’m assuming that if the ants can get in then moisture or damp can get in? I haven’t seen any damp...