"I am a mid- to senior- level  associate at a City firm and have recently been diagnosed with MS. I have not yet told anyone. I'm not particularly affected by it yet, although how it will progress is uncertain. The symptoms which have particularly affected me so far include fatigue, cognition and language difficulties. 

"Obviously, this has potential to impact upon my role and professional responsibilities. I am also aware of my duties to my employer and theirs to me (including in relation to disability discrimination). To date, I have successfully managed these symptoms without anyone materially noticing them, although I am very (perhaps too) conscious of their impact on me. 

"My performance reviews have consistently been very positive, although now that I have been diagnosed, I see that I am potentially being held back by my disablity.  I haven't yet decided which direction to take in terms of career.  I would be grateful for anyone's views on whether I should disclose my diagnosis to my firm, particularly in the current redundancy climate, or leave it to if or until the MS develops materially."