Thanks for your comments. My current problem is when our dog bolts.
I am working on 'one step reward, two steps reward, three steps reward, etc' method to get him to walk on a loose lead and that will help in some situations.
Unfortunately he hates other dogs barking and whilst we are working on helping him with this you can not predict when it will happen and he will suddenly start running. He is so strong that I struggle to control him in those situations.
Yesterday he also got a scent of something (I wonder if it was a bitch on heat) and I was worried he was going to make a sudden dash.
He has pulled me over twice and I am worried that either I will get badly hurt or he will escape and get hurt or lost,
We have completed two basic training courses and I am taking him to another but it is becoming scary taking him for a walk now,
In certain situations his recall and ability to follow commands is exemplary however when distracted it all goes out the window.
My thoughts are that a head collar will make life safer for now whilst we are still training him but I am very wary of them.