One of the UK's "most technically advanced" indoor farms has opened in Gloucestershire.
The so-called vertical farm can grow salad three times as fast as traditional outdoor agriculture thanks to its controlled, consistent climate.
Lettuce, basil and other herbs are grown under special lights, in a warm humid atmosphere.
"It's turned farming into a high-tech factory," said head grower, Glyn Stephens.
Mr Stephens has worked in farming all his life, growing every kind of crop.
"This is totally different", he told me, smiling, as he checked through some of the salad harvest.
"There's a lot of tech involved, a lot of engineering involved, and you're inside all day long."
The facility looks more like a warehouse than a farm. Rows of trays, each bursting with basil, lettuce...