Emergency and Disaster Planning would have the frameworks on the shelf just needing fine tuning to match the specific event.
The need to start from scratch to get solutions up and running is a failing of COBRA and the government. The National Risk Register identifies what needs managing.
CCS's National Risk Register 2020 (publishing.service.gov.uk)
UK_National_Risk_Register_2017.pdf (publishing.service.gov.uk)
The 2004 Civil Contingencies Act set out responsibilities at local, national, agency and departmental level for different kinds of emergencies. COBR’s purpose is to keep ministers appraised of the situation, to ensure that the wider response of the government is coordinated, to record and disseminate key decisions and updates to all relevant ministers and officials, and to provide ministers and the prime minister with up to date information on the situation for any decisions that they may need to make. Following the 9/11 attacks the committee was used to take the decision to immediately close UK airspace.
COBR (COBRA) | The Institute for Government