Queen was left 'near breakdown' after assassination attempt on Prince Charles

ok.co.uk:

It's reported that the late Queen Elizabeth II "came close to breakdown" after an assassination attempt on the then Prince Charles in the '60s.

The now King was invested as the Prince of Wales in 1969, but the decision didn't go down with many within Wales itself.The period saw Welsh nationalism explode in popularity, with a paramilitary group emerging at the time, known as Mudiad Amddiffyn Cymru, or the Welsh Defence Movement in English.

A member of the group, John Jenkins, was behind a plot to plant several bombs in around Caenarfon Castle, the location of Charles's investitute, in an attempt to kill him.

Historian Jane Ridley recalled the event last year in a review of Robert Hardman's book, Queen of Our Times. She wrote: "Prince Charles's investiture at Caernarfon was a modern take on royal ceremonial designed by Snowdon, but it became a target for terrorist Welsh nationalists, and Prince Charles was lucky to escape a bomb. "Hardman reveals how shattering this was for the Queen.