Over Christmas, we’re rounding up the best of our work from 2015 so that you have something to read to kill time until New Year. Today, it’s all stuff on the demographics, architecture and the fabric of our cities.

  • In January, London’s population finally overtook its previous peak
  • …so we spent some time visualising what this meant.
  • Britain’s fastest growing cities are all in the south – and its shrinking ones all in the north.
  • While we’re on the subject: population projections. How do they work, then?
  • Manhattan’s population density is changing – but not in the way you’d expect. In fact it’s far less densely populated today than a century ago.

Image courtesy of the Nine Elms to Pimlico Bridge Competition.

Image: Stephen Holl.

  • Friends has a lot to answer for: 11 things we just learnt about city centre living.

  • Here are nine building materials made entirely from waste products.

  • Remember that time a charity installed “duck lanes” alongside canals, to promote its highway code for towpaths?
  • And finally, a series of skyscrapers that are definitely not phallic.

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