We had a leaflet through to tell us it was coming. The postie had helpfully folded it inside a Pizza Hit leaflet and it nearly went from letterbox to bin without touching the ground.
My bet is it will transform into some kind of political slagging match at some point. To answer the original question though, I have not got my letter yet. I did get a card saying the census was coming and reminding me by law I have to do it, but that's it so far. 10 years ago I'm pretty sure it was on paper, this year I believe it is online?
Humanists UK sent me a poster saying "If you're not religious, say so" which I will be proudly be displaying in my window, hopefully ******* off the various cult members, sorry I mean Christians, in my road.