"11 The Respondent resists the claim of disability on a narrow basis. Mrs Winstone, Counsel for the Respondent, does not challenge Mr Walker's account of his symptoms. She says that the wording of the Act is such that the Claimant must establish a physical or mental impairment. There is no suggestion of any mental illness causing the functional overlay, though in the absence of objective evidence of a physical impairment she invites me to say that if the functional overlay is disregarded the symptoms do not amount to a disability. Not so, says Mr Walker, who invites me to take him as I find him and have overall regard to his condition as a whole. 12 I have given this matter careful consideration. Mr Walker presents as a man who has difficulties in his life but I have to determine this issue having regard to the framework of the Act. The position is that, put shortly, in the absence of any mental condition Dr Davies has been unable to identify any physical or organic cause for Mr Walker's conditions apart, to a degree, from his obesity. I have been referred to a number of authorities including McNicol v Balfour Beatty Rail Maintenance Ltd[2002] EWCA Civ 1074 and the cases of Rugamer v Sony Music Entertainment (UK), McNicol v Balfour Beatty Rail Maintenance Ltd, reported at2002 ICR 381 . These cases are authority for the proposition that, depending on the facts of the instant case, it is open to a tribunal to conclude that an individual is not disabled where there is no physical or organic cause for his symptoms. So it is here, I find that there is no such cause for the claimant's symptoms and that they are exacerbated by a functional overlay."
"(1) Subject to the provisions of Schedule 1 a person has a disability for the purposes of this Act if he has a physical or mental impairment which has a substantial and long-term adverse effect upon his ability to carry out normal day to day activities."
"It not necessary to consider how an impairment is caused, even if the cause is a consequence of a condition which is excluded[…] What it is important to consider the effect of an impairment, not its cause."