https://www.theguardian.com/science/2019/may/16/electric-fly...
Edit: Also this article says they expect to be integrated with existing transport hubs with last mile done with conventional ground transport.
"He said that the ambition for an app-based on demand service would not mean “landing in every garden... You’d be working with regulation around the world, integrating with public transport systems where they have them. We’re coming at a respectful way of thinking how people live, how we create corridors and not just fill the skies with these things.”"