What primer should I use on a bathroom ceiling with mould before painting with Dulux Bathroom paint?

I’ve got mould on my bathroom ceiling (walls are fine), and I’m planning to repaint using Dulux Bathroom paint. I already have a mould remover spray and will be treating the ceiling first, but I want to make sure I’m using the right primer/sealer afterwards so the mould doesn’t bleed through or come back.

For anyone who’s dealt with this:

What primer works best for a bathroom ceiling that’s had mould?

Do I need a stain‑blocking or mould‑resistant primer?

Anything else I should do after using the mould spray and before priming?