“1 The principles The following principles apply for the purposes of this Act. (2) A person must be assumed to have capacity unless it is established that he lacks capacity. (3) A person is not to be treated as unable to make a decision unless all practicable steps to help him to do so have been taken without success. (4) A person is not to be treated as unable to make a decision merely because he makes an unwise decision...." 2. People who lack capacity (1) For the purposes of this Act, a person lacks capacity in relation to a matter if at the material time he is unable to make a decision for himself in relation to the matter because of an impairment of, or a disturbance in the functioning of, the mind or brain. (2) It does not matter whether the impairment or disturbance is permanent or temporary. (3) A lack of capacity cannot be established merely by reference to - (a) a person's age or appearance, or (b) a condition of his, or an aspect of his behaviour, which might lead others to make unjustified assumptions about his capacity. (4) In proceedings under this Act or any other enactment, any question whether a person lacks capacity within the meaning of this Act must be decided on the balance of probabilities. (5) No power which a person ("D") may exercise under this Act— (a) in relation to a person who lacks capacity, or (b) where D reasonably thinks that a person lacks capacity, is exercisable in relation to a person under 16. (6) Subsection (5) is subject to section 18(3). 3 Inability to make decisions (1) For the purposes of section 2, a person is unable to make a decision for himself if he is unable— (a) to understand the information relevant to the decision, (b) to retain that information, (c) to use or weigh that information as part of the process of making the decision, or (d) to communicate his decision (whether by talking, using sign language or any other means). (2) A person is not to be regarded as unable to understand the information relevant to a decision if he is able to understand an explanation of it given to him in a way that is appropriate to his circumstances (using simple language, visual aids or any other means). (3) The fact that a person is able to retain the information relevant to a decision for a short period only does not prevent him from being regarded as able to make the decision. (4) The information relevant to a decision includes information about the reasonably foreseeable consequences of— (a) deciding one way or another, or (b) failing to make the decision.”
“The questions required to determine whether an individual has capacity to engage in sexual relations are very personal. They are difficult questions for an individual to answer to someone that they have only just met. Many people, whether or not they have capacity, would find such questions intrusive and impertinent. AG, however, after a reluctant start, answered my questions fully. I apologised about three times on separate occasions about the intrusive questions that I was going to ask and hoped they weren’t going to be embarrassing or difficult. After the third time AG said, “just get on and ask me the questions you want to know the answer to.””
“(1) the sexual nature and character of the act of sexual intercourse, including the mechanics of the act; (2) the fact that the other person must have the capacity to consent to the sexual activity and must in fact consent before and throughout the sexual activity; (3) the fact that P can say yes or no to having sexual relations and is able to decide whether to give or withhold consent; (4) that a reasonably foreseeable consequence of sexual intercourse between a man and woman is that the woman will become pregnant; (5) that there are health risks involved, particularly the acquisition of sexually transmitted and transmissible infections, and that the risk of sexually transmitted infection can be reduced by the taking of precautions such as the use of a condom.”
“I asked whether she thought she was at risk of becoming pregnant. She laughed and said “I’m too old. There’s just as much a chance of him becoming pregnant as me” and laughed again.”
“The contract of marriage is in essence a simple one, which does not require a high degree of intelligence to comprehend … There are thus, in essence, two aspects to the inquiry whether someone has capacity to marry. (1) Does he or she understand the nature of the marriage contract? (2) Does he or she understand the duties and responsibilities that normally attach to marriage?”