I The 1947 town and country planning system in practice In bringing the history o f town planning down to our own time, we have to consider not one but three distinct phases. The system set up with so much care at the end o f the war lasted, in its entirety, only a handful o f years. With its most radical elements stripped away, it continued as a ‘development plan system’ from 1951 to nearly 1975, though beginning in the middle 1960s, this began to be replaced by the structure plan system which was universally opera­ tive from 1974. Within ten years, so many additions and substractions were being made to this that the whole principle o f comprehensive planning was in question. Planning was then enter­ ing a phase o f ‘desperate remedies’ , whether positive or negative, progressive or reactionary in kind.