I have my diabetic eye screening coming up and I let my employer know saying: "I have an appointment on... due to the nature of this appointment I would be unable to travel into work afterwards or work from home. Please let me know if this is ok or if you would like to discuss this further" My managers response was, "This is fine but I would like to see the appointment letter" Now, I know she has the right to ask to see this, I do feel that she approched this wrong as I was open to discuss the topic as it was affecting a whole day and feel that maybe this should have been done prior to her asking for the appointment letter, but nevermind. My question is, am I allowed to redact some info on the letter? And how much is acceptable? I want to take out all information relating to diabetes. Am I being really petty by doing this? Or is this ok? She will still see the appointment data, time and location, and the office NHS letter header etc. Would this be sufficient? Or would it cause more problems?