Hello

I had some black mould on a couple of my ceilings, and I've cleaned it off
with bleach. It all seems to have gone/died, but I've been left with dark
grey stains where it was.

Obviously I've got to repaint the ceilings now, but I was wondering if
normal emulsion will be enough - is it likely to come back or stain through?
I've seen fungicidal paint for sale from (amongst others) Screwfix, but is
that overkill? Would an oil based primer covered by normal silk emulsion do
the job?

Thanks in advance.

Jason