So far through the reign of Elizabeth II, has there been documented cases of her 'to "advise and warn" ministers of the Crown?

by saddetective87
Iphikrates

Due to the sheer length of Elizabeth II's reign, we are allowing this question to stand, but bear in mind that we will enforce our 20-Year Rule - there will be no discussion of any case since 1996. Please limit replies to cases that date from Elizabeth's coronation in 1952 and 1996.

Thank you!