On 12/05/2019 11:52, Mathew Newton wrote:
I am still concerned about the mould that is already present. Should I try and clean/remove it?

I wouldn't bother. It'll die when conditions are no longer suitable.

The bigger question is how is the damp getting into the loft. I don't
suppose you have a bathroom extractor that vents into the loft instead
of outside?

Andy