I don't know if anyone else experienced it, but yesterday our house suffered from a huge amount of condensation. The north facing double glazed windows were running even the uPVC frames and the wood frames were covered and the walls and ceiling in our en-suite was dripping even though the extractor was on and the window open.,
No such problems here, despite lots of mist over recent days and 100% RH outdoors.
I've never seen it anywhere near this bad before. Humidity was about 75% upstairs and 65% downstairs. We have reduced our heating and closed off unused rooms. Today the humidity and temperatures are the same but everywhere is bone dry.
I am avoiding use of CH, setting it to 16C round the clock, trying to make do as much as possible with a radiant gas fire in the living room. Even then, the CH very rarely fires. The only condensation I have seen, has been on the outside of the DG windows.
I have a total ban on drying any washing inside the main house, it's only permitted in the utility, on lines with a fan + compressor dehumidifier running. I also have a ban on boiling food in pans with no lids and make good use of an extract hood over the hob.