M
It depends on the activity and the circumstances. Two examples;
Someone who suffers severe pain in the morning and before their pain medication takes effect should be able to successful argue that this would prevent them washing and bathing and dressing and undressing as these are activities that would reasonably be expect to be carried out after getting up.
However, the same argument is unlikely to hold true for preparing food where the DWP can argue that there is no reason why a suitable meal could not be cooked in the afternoon or evening when their pain is under control. Obviously, if there are other reasons why they could not cook later in the day then this may allow then to score points.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems