I can highly recommend Jason Webb. Although he didn't start my horse, I've had lessons with him. I have regular lessons with his associate and former assistant trainer, Tom Mitchell (T M Equine Services). Tom may be able to come to you as he travels and I can't stress enough how great he's been...
I used to have issues with my horse coming in on the lunge. I did a lot of groundwork, making sure he understood the aids to move his shoulders away from me and translated this to lunging. I'd have a look at the Your Horsemanship (Jason Webb) website as there's lots of good videos on there which...
I can recommend Henning Horseboxes. Wayne does pre purchase examinations. He is working on my lorry at the moment and I've already lined him up to do examinations when I purchase a new lorry later in the year.
Hi OP,
I feel you pain as I've been in a similar situation, albeit with my big WB who I've owned from a baby. To cut a long story short, I ruled out all of the physical causes and got some professional help from Jason Webb and Tom Mitchell. I still have regular lessons with Tom nearly 2 years...