I have one room to go, and might go the whole hog there (ironically it's a spare room). But for the rest of the ground floor, the idea of pulling off all the skirtings (how else to remove the T&G boards whose ends go under them, and are fixed with brads an inch from the wall?), and doing the floors again, is heartbreaking, though I might just bite the bullet when I've completed all the other jobs. Or I'll content myself with lots of rugs.
Which leaves the Holy Grail, discussed on here before - how to insulate under a suspended timber floor, with no access from underneath, without removing the floor.