Top-secret plan to evacuate the Queen Elizabeth, Charles, Boris, William, and Kate in case of Russian attack

A SECRET plan has been revealed to get the Cabinet and the Royal Family to safety if a nuclear missile strikes the UK.
There are extensive preparations in place to evacuate the Prime Minister, Cabinet members, The Monarch, and others out of London and into hidden bunkers around the nation in the event of a nuclear attack on the United Kingdom.
Previously, during the Cold War, it was planned to move these heads of state to an underground refuge beneath Corsham in the Chiltern Hills.
It appeared to have adequate space for hundreds of people, supplies, and communications equipment, but the site has been known for decades, so this plan no longer applies.

New contingency plans are now in place, but they are being kept under wraps for obvious reasons.

Protecting the direct line of succession — The Monarch, Prince Charles, Prince William, and his family are given precedence in various isolated places – would be part of a top-level royal evacuation.
A working committee comprising the Cabinet Office, Civil Contingencies Secretariat, Ministry of Defense, and diplomatic protection draws out the location and plan specifics.