The UWF cars had some minor changes from the ones built by UPD, including softer springs, new alloy wheels, a revised dashboard and new taillamps. Some refer to the cars built by UWF as "MkII" cars, and the ones built by UPD as "MkI". Other references use the MkII designation for a planned successor to the GT that would retain the mid-engine layout but be larger than the original car. Early design work was done by Peter Bohanna. When this project stalled, Bohanna partnered with Robin Stables to form Bohanna Stables and produced a mid-engined prototype called the Diablo that debuted at the 1972 London Racing Car Show and was later developed into the AC 3000ME. The "Mk2" moniker has also been used to refer to a much later design done by Dare-Bryan for a successor to the GT, this one powered by a mid-mounted Toyota powertrain, that never reached fruition. UWF stopped production of the Unipower GT in late 1969, and the last car was delivered in early 1970. Total production is estimated to have been at most 75 cars. One reference reports that 73 cars were built, with UPD responsible for 42 units, and UWF for 31. Around 30% of production of the GTs were built in a left-hand drive configuration. The process of liquidating UWF began in December 1969. The company was completely wrapped up by March 1975. In late 2016, four Unipower GT's, the first production Unipower GT built, the first Competition version built, a Left Hand Drive version and the last of the UPD cars produced and undergoing a major restoration, with their respective owners, Tim Carpenter, Gerry Hulford, Mark Glaisher and Thomas Jay, gathered at the Supercar Classics event at Beaulieu, England, organised by the Unipower GT Owners Club & Register, in celebration of the 50th anniversary of the car's launch. Related Quasar Unipower The Quasar Unipower city car is related to the GT only in so far as it is built by the same parent company, and is powered by an engine from the same family. The Quasar was designed by Franco-Vietnamese designer N'Guyen Manh Khanh. The car's body was shaped like that of a rectangular prism, with the four side faces and the top made of glass. The car was long, wide, and high. Its turning radius was just . Access to the interior was gained via one of six sliding glass