There’s one memory that in the UK clearly divides the generations and that the sight of a little 3 wheeled blue car on the streets and more accurately parked on double yellow lines. When the NHS was wet up in 1947 one of the tasks was to provide transport for mobility impaired patients, this was undertaken by the Invalid Vehicle Service. The 3 wheel layout had been round since the early 20th Century but a change in the law meant road worthy exceptions to what was classed as a car could be built.