Ewwww !! On Saturday we moved the bed further away from the wall as we have seen this ghastly lot on the external walls. The black mould is coming through again through the anti mould paint the landlord painted on a few months ago. The white stuff is wet gooey stuff. Is this actual damp seeping through the walls, or is it another form of mould. It's disgusting, gooey and there's loads of it all on the external walls.