Since Brexit living in Finland became more complicated, since Brithish citezens no longer belong to the EU, I have had to apply for a residents permit. I had to fill in an online form, which i felt was deliberatly confusing and difficult to complete, get copies of marriage certificates and birth certificates and tons of other documentation, copy them and upload them to the migration office, and some were rejected because they were in the wrong format. It gave me a headache just wondering what might happen to me if I did not complete the forms properly. In the end I was summoned to an office in Lahti to present all my documentation in person, and was told it would be 6 months before a final decision would be made. The whole experiance was Kafkaesque.
This week I was granted a permanent residents permit which is a relief and so ends the torturous imaginations of the bad things that might happen.
Now I only have to worry about lockdowns and covid passports
We've just been through the same process here in France, Rob, but, when I actually, FINALLY, got down to doing it, it was quite easy. There was an online form to fill in, which asked for scanned Passports and three documents proving residence, and then we were given appointments online to visit the administrative Police headquarters for the department in Tulle, to present our Passports and have our fingerprints taken (a great disappointment this, as I was hoping for an ink pad and it is actually done electronically now.) All the information was then sent on to Paris, where it was processed and the "Cartes de Sejour" were issued. The "Cartes" arrived in the post at the end of last week. Your situation sounds like a nightmare by comparison ... I'm glad that it is now all sorted!