We have treated a damp problem in our older property and have been told not to use a vinyl paint. Can you recommend a suitable paint?

This is because vinyl paint will effectively seal the surface and the damp will only move elsewhere. You need to let the damp out by using a breathable paint. Of all Earthborn interior paints, Claypaint has the highest level of breathability and is particularly suited to older houses or properties that have suffered from damp.