We had a couple of fatalities in our neighborhood a while back dur to "glare". The solution, JMO, is the same as for fog or any other condition that limits your vision: Don't keep driving. Stop your car. Pull over, if necessary. Wait until you can see before proceeding. Fairly simple.
Sounds like the Prince just pulled out into traffic, even though he couldn't see other cars approaching. That's his fault. If it costs the Queen some money to pay for damages and injury to the victims, so be it. It's only fair in a civilized society.
Early 70’s here and we hate driving in our town of about it 22,000. It runs approximately east-west. Glare on the main drag is bad just before sunset (and sunrise if you’re up that early), when people are commuting. I try to stay on side streets then and avoid driving directly into the sun. My husband and I just decided to avoid driving in the evening in busy areas when it rains. Thanks to faded lines and glare, it’s really hard to see turn lanes, etc. Getting old(er) is a real pain, but we don’t want to hurt anyone, and frankly, so many people scare us by driving and riding their bikes like idiots! Don’t get me started on pedestrians!

So I think it’s time for Prince Phillip to hang up his keys.