The issue of driving when the driver is over 70 is avery personal issue. Some aged drivers are very good, and pose no problem, however, some have completely lost the plot, as it were, and pose a significant risk to others. I know that this does not only apply to older drivers, many young drivers are a nightmare.
As for renewing licences, at 70 and above, one has to sign a "fitness to drive" form, from the DVLA, and I believe the persons GP has to countersign it too, and this has to be repeated every 3 years. BUT,,whilst the GP can sign thatthe person is physically fit, he does not know what the persons driving is like, so its a bit of a stab in the dark, and how many people would readily admit to not being able to drive due to advancing age and infirmity?
There is an aged lady where I live who drives a Golf GTi, and she only ever goes at 28mph,whatever the speed limit. She has no idea that if she presses the accelerator a bit further the car will fly!!!!and she would probably have a heart attack!!She has no idea how much power there is under the bonnet of this "nice little car".
As for towing, only people who have held licences issued prior to 1997 can "just get in and tow", everyone else has to take the extension training and test to be able to tow , adding the cost of training, plus test cost to what is becoming a very expensive learning process.
I feel that older drivers should have to demonstrate they are capable of dealing with todays driving conditions, maybe in the form of an accompanied assessment of their driving , but not in the sense of retaking the whole driving test.
I am getting towards that age, and feel it would not only be fair to everyone else, but also myself and family to have an independent assessment and be assured that I was not posing an unacceptable risk to others.