You know, the more I think about this, the more I bristle at Dyson claiming this will solve Britain's food security problem.
Firstly, this kind of system seems limited to small cash crops rather than staple foods. (Good luck growing wheat on these.)
More importantly, Dyson has personally done far more to harm British food security than this gadget could offset. He was an ardent Brexiteer, which resulted in substantial barriers to importing food from our closest neighbors. (He also then immediately started relocating his business to Singapore in a stunning show of confidence in post-Brexit Britain)
These people don't want to save the world. They just want to look like heroes