write complete buisness continuity plan for an attack at heathrow airport london. consider the scenario that heathrow airport is under a cyber attack and all services are down for more than 7 days. Suggest alternative ways to continue flight operation from london city. The plan should be of at least three thousand words. their is no maximum limit of words. Pictures and graphics should be added to the answer.

Note: no less than three thousand words are accepted. follow the six steps of buisness continuity plan.

1. Project scope development and planning:
2. Business impact analysis (BIA) and functional requirements:
3. Business continuity and recovery strategy:
4. Plan design and development:
5. Restoration.
6. Feedback and plan management.