Her Majesty did not drive ambulances during World War II. She served in an honourable capacity, certainly, but as a truck driver, not an ambulance driver.
Her Majesty did indeed drive an ambulance. In particular, she drove an Austen K2. See pg. 19 in the book.
Constitutionally, the Prince of Wales is unable to criticise Her Majesty’s Government.
If this is true, then I apologize.
I thought American conservatives generally believed constitutions should be treated with respect.
I do absolutely, however as I was unaware of this significant difference between our respective governments, you have my apology. Furthermore, you will notice that I did not criticize Prince Charles for being in attendance.
Unfortunately I can't access page 19 in the preview, but I believe it to be incorrect. Why? Because Her Majesty herself corrected me on this point - and believe me you do not forget being told you have made a mistake by your Queen!
OK, I have just managed to access the page through another route. I can certainly believe she learned to drive the K2 as it says at 1 Mechanical Training Centre but that was where she trained. She became a supply driver after completing training.
The Blitz occurred when then Princess Elizabeth was only 13 and 14 years old - I think there's a lot around on the web that has taken the fact she was a driver (and the book you've quoted does convince me she trained on ambulances) and have extrapolated from that as to what her role was.
By 1945 when she was 18 and had joined the ATS, there wasn't that much call for military ambulances within Britain anymore. I wonder if that was why they might have been used in the training schools.
I did notice that - and, frankly, there's no particular reason you should be familiar with the nuances of Britain's constitution (especially seeing significant parts of it are unwritten and then bits that are written are scattered through dozens of documents). It's just that as a friend of the Prince of Wales, knowing he isn't really in a position to defend himself, I often feel driven to defend him. He's a decent, honourable man - some slightly odd political beliefs (in my view) but a man dedicated to a life of service to his country and to the commonwealth.
Constitutionally, the Monarch has the power to advise and warn their Prime Minister of their concerns in private. But not in public. And the Prince of Wales must always be aware of the fact that he could become the Monarch at any instant - and Her Majesty's Government might suddenly become his own.
He can discuss policy in very careful terms, publically - but he has to choose his words very carefully. Part of the reason he has a reputation for being odd at times is because often he's only felt free to talk about issues that the government doesn't really have a policy on - fringe issues.