I haven't read the whole thread so this has probably already been mentioned, but it was said he was dazzled by the sun, which of course is very low in the sky this time of year.
It's always a problem on east/west running roads, and surely this problem affects us all on sunny days at this time of the year. I am sure there are lots of accidents all the time due to people of all ages being dazzled by the low sun so I really don't think his age was significant here.
No-one was hurt, and if it hadn't been the D of E we would never have heard about this accident would we?