Sounds like my gran-honestly I wouldn't want to be oncoming traffic to her!
I don't think the police would do anything either, as can't take someone off road when haven't caused an accident.
I think it's time the law changed, as if you think you are a bad/dangerous driver then you have to declare it to the dvla, but come on, most people have cars these days to get around, so what person is gona do that!
I think they should re-take tests at 65 for there own safety and ours.
My nana doesn't know what half the signs mean-she is 75 so think it's 58 years since she took her test-alots changed since then, so in a way it's not there fault as no law, but the law should change!