After many years of science teaching in a very pleasant environment, a large grammar school, I find myself in a strange position. For the first time I have a colleague that I cannot abide! I really dislike this person. Ok, I have to work with them. Can anyone tell me, do I have to be nice or even polite to them? I am not, in any way, their manager. This person has, in the past in another school, made claims about discrimination and gone to a tribunal. They then moved to my school. My question is basically how do I have to behave. I am polite, barely, when I have to communicate. This has to happen quite frequently as they are a technician in the department. Could someone claim harassment or similar just because I do not like them and might be rude? It will not be deliberate, it might slip out. Any advice would be welcome.