Update
I decided to get a shock collar for me patt and see how that went,am pretty shocked myself really,the collar has a bleep that you press when they are doing what you want (i dont bother with that just give him verbal praise),a vibration and a small shock(it's i would say less powerful than a static shock,i have put my fingers on it a few times and it certainly doesn't hurt the dog),i would say the shock just breaks their train of thought so that you can reinforce what you want them to do.
Really surprised, i have only tried two commands"leave" and "back",it's early days but massive