Thank you, Home Office! My application was successful and I have Permanent Residence status. For now.
Of course, I have this right while the UK is member of the EU. Therefore, the Home Office news updates keep telling me how valued we Europeans are in our contributions to the British economy and how we Europeans don’t need to do anything at the moment to ascertain our rights to remain. Quite. We are encouraged to wait and carry on contributing to the economy until BREXIT bites (or some 2 years after that).
For now, I can live with the illusion that after BREXIT I have a choice. However, my Permanent Residence was granted under existing EU laws, and whether or not in 2019 or 2021 the shiny new permit card in my possession will be worth the paper it was printed on, is something else.