I thought a brief update might be appropriate for anyone following the thread. When I posted the question I never expected it to be so emotive.
I thought it might be an idea to explain why I felt the need to look at different training methods. I live on a farm - below is a picture taken this afternoon of Lulu with her next door neighbours:
I hope people can now understand my need for Lulu to obey my commands without hesitation for down, heel, stay and leave it. Its not a case of dominance - I simply need to be in control. If Lulu continued to pull or her lead, charge ahead of me, lunge and jump up on everyone and everything she was in real risk of being shot by the gun happy farmer next door.
We attended kennel club training for many weeks and the trainer was unable to help me stop Lulu jumping up etc so we now go to a gun dog trainer who made an immediate difference. Ceasar Millan was mentioned which prompted my original post.
Although there is no quick fix, and we have many months of hard work ahead we have certainly turned the corner and Lulu listens to my commands now.
On a lighter note to finish, I know the lambs are cute - just wait until the micro piglets arrive in a couple of weeks.