 By this time, the structure of civil defence was changing again, as the government realised that a more flexible system of protected sub-regional controls was needed in order to revive a link between central government and local authorities who would bear the brunt of post-attack planning.Regional Seats of Government would not now be hardened structures and would be established as soon as possible after attack, under prearranged plans at locations that would be selected in the light of circumstances.More ex-ROTOR stations were pressed into service, and existing RSGs and SRCs were combined to form a new network.