Hello there,
I had my test in Leighton Buzzard not long ago. I didn’t train with Hughes but I did happen to speak to a few of their instructors whilst I was waiting in the test centre when I was visiting during lessons. The idea I got from a couple of their instructors is that some of them are awful and gobby, whilst the others seem to be down to earth and great! Hopefully you get one of the good ones 
Good luck!