20th Century architecture: Is it the end of our 'concrete jungles'?

Concrete was the building material beloved by councils as they embarked on post-World War Two development.

But it is fair to say many people were never quite as taken with grey skyscrapers and suspended walkways.

Now several of the cities defined by concrete - Birmingham, Coventry, Hull and Portsmouth - are undergoing multimillion-pound makeovers.

But what are they losing in their quest to be the "modern cities" of the 21st - rather than the 20th - Century? — bbc.com