What were the names of the cartoon couple that appeared in a number of UK public information films?

Joe and Petunia are characters from a well known series of public information films in the UK. They appeared in four films which ran between 1968 and 1973, and they became popular so quickly that it was decided to kill them off in the final short Worn Tyres Kill in order to prevent public demand for their reappearance. They also appeared in a much earlier public information film which showed them learning to use a pelican crossing, but it is noticeably different from the others in the series.

The Joe and Petunia series was made by Nicholas Cartoons, also responsible for the 1978 television series Willo the Wisp. The films were animated and featured Joe, a tiny little man in pinstripes, and Petunia, his enormous wife who wore a hat and sunglasses and could often be seen licking an ice cream noisily. Voices were provided by Wendy Craig as Petunia, later replaced by Brigit Forsyth for the last film, and Peter Hawkins as Joe. In each film, they caused danger with their unbelievable stupidity, advising the public on what not to do in a similar situation.