@mloxton @simon_brooke I think that a key aspect, as mentioned somewhere else in the thread, is that some jurisdictions go beyond good samaritan laws, adding an explicit duty to help and/or an explicit waiver of lesser laws that are necessarily broken when responding to an emergency.

In the US, I'd routinely see emergency vehicles, full lights, sirens, and horns, stuck behind cars whose drivers don't want to cross a red light to let the emergency vehicle through.