It's worth noting, [I think] that it’s not just the PM who disagrees with the Supreme Court's decision today. So do the Lord Chief Justice, the Master of the Rolls and the Lord President of the Queen’s Bench Division.
Lawyers, eh? Experts?
It's definitely worth noting. The Queen couldn't have foreseen that Johnson's request would be ruled illegal considering the legal experts themselves don't agree. We deal with this all the time in the U.S., even with our written constitution.
No matter what the Queen had done - refuse or accept Johnson's request -she would be criticized. IMO she did the right thing - accept her PM's advice (as she has always done) to avoid being seen taking sides.