Loading onto a horsebox is different to a trailer. The ramps are often a lot steeper and on some cab. Be quite narrow. Also, many only have some ramps which means a horse has to turn as soon as he gets inside.
Generally horses travel and load better in a horsebox rather than a trailer. The roads in the UK are twisty and many corners with bad cambers (to say nothing of the potholes!)
I will always give a youngster the benefit of the doubt when loading until it is just saying "NO" then it is no nonsense time.
There should be little difference in my mind, it is not about the loading, it is about the horse following you. Why does the UK ramp make any difference? Gibbs has never loaded on a ramp, until we went to the show, and he loaded like a champ, unloading was hilarious, backing down with teeny tiny steps.
My filly, Angel, had a couple of loading sessions before I had my jack knife incident with her in the trailer, that should have been enough to sour any baby, but she jumped right in behind me when my friend and I turned up with her strange trailer.
Again my issue here is all the assumptions being made of what was and wasn't said to the shipping company, and the horrible way that people have reacted to a new user, posting in the new to horses section. I must also be in a minority of one, because I have ALWAYS taken the responsibility of loading horses who leave here, and have always left it to the old owner to load a horse when buying. If this had been a horse in her possession for a long time then yes haul her over the coals for the fact he doesn't load, but she was just buying him.
Oh and believe me FH, while the UK has the prize for twisty roads and cambers, your pot holes are BABIES compared to Saskatchewan