just to comment again on the "beyond join up" benefits, and say again how much I like the work in Dancing With Horses.
I had a long reining lesson on Saturday. I've played at it before but not really known whether I was doing anything right, or what the real "aim" was.
But I found myself using both my parelli principles (shoulder-in on long reins

) AND the KFH Dancing With Horses body language to get my half-halts.
And the end result was that rather than Fi and I just dashing madly round the school tied to each other

we actually did some real training

Walk, Walk shoulder-in, then to trot with some trot shoulder-in. My rein changes aren't very slick yet, but I can practise that. And I don't think I'm fit enough for canter yet
but it was one of those moments when all sorts of bits and pieces come together to make one lovely whole
And my instructor for this session said - well some people use the whip or flap the reins to ask the horse to move off, but I just use my energy

(Just want to point out that this is a "BHS Instructor" - so they're not all bad !)
So Ashtown Honey "can you explain how you would get the horse trotting around you, are you lunging?"
No you are not lunging. But when you work out how to do this with just body language, you will find you can use it with lunging and riding
When you start, you will probably need quite BIG body language as the horse has to learn what you mean. But over time it gets quieter and quieter.
What you want to do is raise your energy level and DRIVE the horse forward. Imagine the horse has a "bubble" of personal space around them (different horses have different spaces, and are more or less sensitive to it). "push" the bubble so that it moves away from you. If the horse doesn't move, push harder. This is all just with your body - like when another person comes into your personal space. When you start, it can be use to have e.g. a carrot stick or small length of rope - this is purely to give you a "longer arm" and keep you safe rather than for "punishment". I told my niece to be a "lion" and just thinking of that got the body language she needed
arg - this could turn into a novel. let me know if above makes sense and/or what needs more explanation or clarification !