I'm struggling with my NQT + 1. Last year when I was his NQT mentor, I regularly gave him feedback and there were some things he responded well to, and other things he chose to ignore, but were still important. At times I'd find him belligerent, defensive and on the brink of rude, regularly threatening to leave. This year he's been OK on occasion but I've picked him up on a few things this week and he came to see me to tell me all his stresses at work are because of me, he's scared to come into department meetings, he's afraid to check his emails in case of what I've said, and has claimed that I belittle him. He told me I have poor people skills, and that I'm not taking in what he's saying. He also tried to tell me what I should and shouldn't be doing, and that coming into his lessons wasn't appropriate. He's not an incompetent teacher, but has problems with professional conduct. The things I pick him up on are having his phone out in lessons, chewing gum in front of the students, punctuality and once he did some one-to-one marking in a cupboard with the door shut (class remained in classroom). These are small things but he is so defensive he then points the finger at me. I'm finding it pretty impossible and my line manager 'has a word' with him but it's ineffective, and is reluctant to be more formal with him. I don't know how to manage him but he has accused me of causing him anxiety and I'm not doing anything unreasonable. Any suggestions?