[zoelula]

I'm sorry you're going through this, it's wrong, wrong, wrong. What you do have control over, though, is "how they make you feel." Don't take this on emotionally. They are being jerks (and probably illegal, I don't know the labor laws in UK). You are not incompetent or a bad employee because you are diabetic and want to take care of yourself (need to do so!).

As for the meeting, I would do your homework and come prepared with written information about your legal rights from, as someone said, a reputable organization. If you belong to a union I would definitely consult with your union rep first. But I wouldn't start out with the legal stuff. I would start out with the human side. But I agree, that you should try and do whatever you can to not get mad or break down. Make notes and bring them with you so you clearly can go from point to point on what your needs are. Throw in that diabetes is considered a disability legally and you can even keep your written references in view so they know you mean business. Try and strike a tone of personal but firm. Then if they discount everything you say from that perspective, take a deep breath and bring out your legal references and tell them you plan to do what you need to do to fight this. Good luck and let us know how it goes.