The message om
from "bp" contains these words:

As for water running down the inside of the roof timbers, I can go into
the loft quite easily. What should I be looking for. Do I need to
wait for heavy rain, or is there some damage that I can look for. Note
the mould is towards the floor not near the ceiling - would this be in
line with this type of fault?

Generally it'd be in the top, but you'd be amazed where damp can end up!

--
Skipweasel
Pay no attention to that man behind the curtain.