Liverpool .Unit By Unit (1964)

looking at the Unit Camus system for constructing houses and flats.  Concrete panels are cast at the company's factory in Speke, before being transported to the building site at Queens Drive in Liverpool and slotted into place.  Plans for the new factory in Kirkby are revealed, and also a finished block of flats in Liverpool. The first part sounds like the tv series, Mary Mungo and Midge, as Richard Baker provides the commentary