CJ, just seen no one has replied to this so I will. You don't need anti condensation
or mould paint. What you do need is lots of ventilation to keep the mildew in check. You can't get rid of it, its a natural occurring problem for all of us. Howver, ventilation, ventilation and just for good measure more ventilation will stop condensation causing mildew.
So plan of attack, ignoring the wet paint problem, get the inside of the boat dry. Take any cushions
home, wash covers and dry the foam somewhere warm. Next lots of bleach, wipe down all surfaces inside lockers and the interior hull
as the bleach kills mildew. ventilate the boat and all spaces including under bunks and leave the lids propped up so the air can circulate. Finally ensure you have plenty of vents. On our M31 we have 7 which is sufficient to change the air often enough we don't have a problem even without any heating
Final thought, before you start getting frost in NI drain all water tanks
and pipes including the heads because a boat stored ashore will get very cold. We stay in during the winter so the sea temperature at 6c stops ice forming, but on the shore the temperature will drop and any water
on board will freeze in NI.
Not sure what to suggest about the paint. I would either add an electric
heater for a week if you have power from the marina or leave it for the winter. It might harden eventually, otherwise it's a horrible job to remove.