Mr Bean

I saw a peculiar sign today in Knightsbridge. It stated: No vehicles permitted except invalid carriages. At first I thought this was a politically incorrect euphemism for wheelchairs, but then I discovered it referred to Mr Bean's car! Well, not his car per se, but a three-wheel low-cost vehicle provided in the 1960s and 1970s for people with disabilities. Maybe useful to know for a trivia night!