As I recall, the UK ANO has (or had) the phrase "nothing in this Order shall prevent the pilot-in-command from carrying out any action he considers necessary to protect the aircraft, passengers and crew". This allows you to fly inverted through Tower Bridge, but you'd better be able to justify it to the authorities. How do you justify "I chose to ignore the RA, for the safety of the aircraft etc, and in the process killed 200+ people"?