New policy, ongoing demand for affordable housing and a lack of land in city centres all point to a rise in rooftop development.

Last year, the government introduced a new permitted development right to allow two-storey residential extension on top of existing buildings. This type of development can fund wider refurbishment and fire safety measures, with scope to provide 180,000 new homes in London alone.

But still, resident backlash, a misunderstanding of the industry and complex construction requirements pose a challenge.

In this podcast, EG's residential editor Emma Rosser is joined by councillor Stephanie Cryan, cabinet member for council homes and homelessness at Southwark Council; Arthur Kay, founder and chief executive of Skyroom and Phillippa Prongué, chief operating officer at Apex Airspace.

The group discuss the potential for airspace development and what is needed for this to scale.