Had to sign up for this. Take extra care to use appropriate materials for a house this age or you'll create more problems than you solve. Solid stone walls need to breathe!
Make sure you've spoken with a surveyor specialising in heritage property too.
I intend to use rockwool for the floor and roof crawl space.
Luckily I have a relative in the field who can share advice. I am conscientious of the condensation issue. There's a company local to me who use hemp boards which are porous. What you say is definitely something to consider given the extent of work involved, and to possibly undo.
Make sure you've spoken with a surveyor specialising in heritage property too.
PIR boards are almost certainly unsuitable.
https://www.victorian-house.co.uk/ (be sure to pick up a copy of the Haynes Victorian House manual, it's a gem)
https://www.lime.org.uk/community/boards-insulation.html
I'm currently having to undo poor choices of modernisation on a building of the same age, which caused tremendous problems with damp.