Hi rosie, as your report has never mentioned dyslexia to you, you cannot bring it up in an official appraisal. You can ask open questions (e.g. how good do you think your writing skills are), but the rumour may not be true and it is up to her how much she lets you know. You should definitely address the performance issues. If the issues are severe, multiple and long standing you may need to consider putting in place a programme to address themn all with the appropriate support and some very clearly agreed goals and performance measures. I have done this in the past and it really worked. I got the performance I needed in a relatively short space of time. Getting the balance between appropriate support and a good degree of challenge seemed to be key. (If I had been asked to bet at the beginning of this process if it would work, I would have put ?50 on no, it was a pleasant surprise that her performace turned around so dramatically so quickly) However, if she is not up for it or it doesn't work, you may need to consider managing her out. I have also done this and it is not pleasant, but ultimately I cannot live with persistent under-performance. Also the person I managed out of the organisation has found a new lease of life in a new job. The change was just the spur he needed. This stuff is not easy, but whatever you do, do not dodge the bullet, it will only come back to bit you in the ass.