Disability is the difference between capacity and capability. In the case of parents parental capacity of Working Together and parental capability of s.1(3)(f) of the Children Act 1989. Disability is defined as a mental or physical impairment with and adverse effect on normal day-to-day activities. A person without the use of their legs lacks the physical capacity to walk. They are not capable of carrying out the normal day-to-day activity of, say, shopping without some corrective measure such as a mobility scooter (see s.6 Equality Act 2010 and Guidance on Matters to be Taken into Account when Assessing Disability).