“22. It seems to me, if a condition of anxiety and depression is diagnosed by a GP which causes the GP to advise the patient to refrain from work, that that is in itself evidence of a substantial effect on day-to-day activities. The Claimant would have been at work and his day-to-day activities include going to work. If he is medically advised to abstain and is certified as such so as to draw benefits and sick pay from his employer, that is capable of being a substantial effect on day-to-day activities. It is of course a matter of fact for the Employment Tribunal to determine.”