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.