to echo Morticia, each case is different and in looking at what is reasonable will depend very much on individual and their cicumstances. Even in tribunal decisions there is no defining case which sets out practical tests applicible to all. However under the act employers have a responsibility to respond to disability issues including investigating and making "reasonable" adjustment, this should also include in cases of stress etc looking at in work causes .. failure to review these elements (especially if bullying or harassment may be involved) could give rise to a very strong case against them!