I just have to say today was HEAPS better, thanks to all of the advice.
We went to the beach and before I would throw the ball she had to come and sit close ( close enough to grab for the lead later) it took a bit of patience as she knew what to do but didn't want to. When we throw using the ball thrower we give her a break every now and again as she won't give herself one (obsession). After each break she had to come and sit near me again, the reward being I would resume throwing the ball. After 40 minutes we reached our exit and did some more throwing a rest and a sit at which point I clipped on the lead and off we went. EASY. There were no distractions today so i am not kidding myself we have arrived but we have a shape for training.
I have also ordered a tug lead and will start using that at other times.