Thanks! Some additional heating is being delivered today to raise night temps.
The vet's were seeing has been recommended by a few keepers locally, so I'll see how we get on. We're not actually checked in for the nose thing, just a general check up on weight etc, but I will keep in mind your comments.
Many tort problems are because of the way we keep them and if you make the changes recommended you should see a difference.
Providing night heat will certainly help - a CHE run through a thermostat is ideal.
You could also cover your table with a mini greenhouse which will help you control and contain heat and humidity.