Over 200 towers of at least 20 storeys are currently planned in London, of which three-quarters are residential buildings, according to data compiled by New London Architecture (NLA). NLA, an organisation encouraging debate and discussion of development in the capital, made these recent announcements in advance of the London's "Growing… Up!" exhibition, taking place this April.

 “As London’s population gets bigger and bigger and new development for London takes place within the constraints of the green belt, we have to increase the density of the city," said Peter Murray, chairman of NLA and curator of the forthcoming exhibition.
"This results in our buildings getting taller. The huge number of towers in the pipeline will have a significant impact on the look of London".

English Heritage is reported to have called on Mayor of London Boris Johnson to regulate development control further in order to make it harder for such a volume of towers to be built. According to the Financial Times, Nigel Barker of English Heritage said, "we are not against tall buildings, they have always played a part in London’s history – for example, the Tower of London, the Palace of Westminster and St Paul’s Cathedral. But this is a very significant amount of new development that most people are not aware is coming through the system”.