Michael, I can't believe it, is this a suggestion that people should go looking for official communication from their council via SE23.com?
You are joking, right?
Joke, moi?
In the words of Prostetnic Vogon Jeltz of the Galactic Hyperspace Planning Council:
There’s no point in acting surprised about it. All the planning charts and demolition orders have been on display at your local planning department in Alpha Centauri for 50 of your Earth years, so you’ve had plenty of time to lodge any formal complaint and it’s far too late to start making a fuss about it now. … What do you mean you’ve never been to Alpha Centauri? Oh, for heaven’s sake, mankind, it’s only four light years away, you know. I’m sorry, but if you can’t be bothered to take an interest in local affairs, that’s your own lookout. Energize the demolition beams.
The council did include details in Lewisham Life, but I can't imagine that anybody (other than a Vogon) would argue that this alone would be sufficient to communicate the changes to all residents.