

Is this mould? Is it safe?
Hi all,
I'm looking for a new place to rent. Whilst doing the viewing and taking my little video round the property, I noticed some black marks on the bottom of the wall here. I couldn't tell if it was scuff marks generally or black mould.
Advice would be appreciated! I'm kinda desperate to find someone, but really don't want to be dealing with really bad wall mould (again...) so will not bother if that's the case here. For reference, this was a ground floor/first floor room.