Although conferences of authorities have assembled from time to time in many regions of Britain, only in two metropolitan regions have they sustained a serious process of cooperative regional planning for more than ten years. There have been continuous conferences in South East England from 1962, and in the West Midlands from 1966. In both regions the conferences have fluctuated in their membership, in their preoccupations and in their methods of working. But uniquely in British experience, these regions have accumulated a long, unbroken practice of regional cooperation amongst equal partners.