Hi Adam, I suggest that you meet with the new teacher at discuss the risk assessment. Yes, there is a lot of stuff out there, but mostly it is generic and may not be applicable to this individual. You will probably also have to complete a Personal Emergency Evacuation Plan as part of your revised Fire Risk Assessment, and may have to make a few building adjustments to enable them to fully participate in school life. The new teacher will probably feel a lot better if he / she has a say in these things, rather than something imposed on them.

My advice, as someone with experience of MS in my family and in the workplace is to risk assess the person not the condition. MS affects people in many different ways, at different levels and can come and go to a certain extent. Just treat the person as an individual, ask them how they feel and judge accordingly. Guidance is a good start point for background but may not be specific in this case. hope this helps Good luck and best wishes