Under license from BMW, Isetta of Great Britain began producing Isettas (the sliding-window variety) at Brighton in 1957 with selected British parts. The Isetta was initially not popular in Great Britain until a three-wheeled version was introduced. The three-wheeled version was taxed at a much lower rate than the four-wheeled version. Isetta of Great Britain continued to produce four-wheeled Isettas, but only for export to Canada, New Zealand, and Australia
I've never seen any reference to Isetta's without a clutch pedal until I came across this Smiths Selectroshift brochure. I'd be interested to know if anybody drives one of these British Selectroshift Isetta's.