I believe Kev mentioned somewhere else that the "Dazzer" was available in America and I think you are correct, I assume it is a kind of attention grabber.
Went down with all three onto a different beach last night. Plenty of new smells and distractions and it was back to the drawing board with Jazz

I fastened 2 slip leads together and repeated the method as in Kev's post...........eventually the penny dropped and we made progress where I wanted to go
It is a good job Heather and Brandy are a bit further on in their training, I was able to let them go so I could concentrate my efforts with Jazz.
Just goes to show, just when you think you've mastered it there's nothing like a springer to -*test*-('") you
Steve