jack
answers to you summery
1, yes you can drive a tracked vehicle on the road with your car licence with a class H licence holder supervising with you and "L" plates displayed, A full car licence is a provisional licence for this class just like it is for an LGV PSA etc classes.
2, Take the H class with the correct training is the way to go.
3, If you can allways have a commander with you, They can see more than you ! a must in tight areas depending on what you are driving MBT,Scorpion etc the vision from the driving positions is very different.
4, Rubber pads reduce the risk of damage to the road surface as john says in his post " steel tracks are VERY slippy on wet roads so you have to take it very slow to avoid losing all steering and braking." I have been with john on the road in his and it can be scary when you try to stop it just keeps sliding like in a car on sheet ice. One of the things you get when driving any armoured vehicle on the road is respect from most of the road users.
Al