Not surprising perhaps. Phil has done some unusual things over his 97 years. He also seems to be stubborn to a fault. Driving alone after a road accident he seems to have caused and without a seat-belt qualifies as evidence.
Today he is reported to have ‘surrendered his licence voluntarily‘. Which I’m sure is RoyalSpeak for being banned from driving. I mean, if I wanted to give up driving, I’d simply stop – with my licence intact. ‘Surrendering’ it implies police involvement – which I expect will lead in due course to serious charges.