Thanks foobar...damn, I thought I had it sussed! Back to the drawing board.
Thanks for this good advice ladyK, that did not seem to take you too long, i imagined that process would take a lot longer and figured I did not have time for these niceties, but I know, it's better to do it properly from the start.
I wish I had got these buckle halters now but having spent this money on the rope halters, and not expecting to do a lot of showing, I thought I would now make do with what I had.
Magnus did feed unhaltered from my hand this morning for the first time so he has obviously not lost all trust in me.
It is quite fun anyway.