The Locost is a popular kit car design based on the Lotus Seven, but intended to be built using readily available and inexpensive materials. The design was popularized by Ron Champion's book 'Build Your Own Sports Car for as Little as £250'.
The Locost is not a product of a specific company, but rather a design that individuals can build themselves. The design uses a spaceframe chassis constructed from steel tubing and is typically powered by a readily available engine, such as a Ford Pinto engine. The bodywork is usually made from aluminum or fiberglass.
The Locost is a popular choice for amateur builders and track day enthusiasts due to its simplicity, affordability, and performance potential. There is no official Locost company; the design is open-source and widely available. The current status is that it remains a popular design for home-built sports cars.