All Change was an English children's television show on ITV in 1989 and 1990 (Also later repeated on The Children's Channel in the early 90's). It starred Frankie Howerd, Peggy Mount, Maggie Steed, Tony Haygarth and Pam Ferris, and was devised by Morwenna Banks and Chris England.
The storyline concerned Uncle Bob, played by Howerd, who would give all his money when he died to one branch of his family. One branch was poor and common, the other branch was rich and snobbish. Each family had two parents and a son and a daughter.
The rich family lived as the poor family and vice versa, although one child stayed in their own home with the newcomers, finding out how the other half lived.
After the end of the series, it was all revealed as a hoax and no-one was any better off.