National survey and analysis of barriers to the utilisation of the 2005 mental capacity act by people with bipolar disorder in England and Wales.

: The Mental Capacity Act (2005) (MCA) provides a legal framework for advance planning for both health and welfare in England and Wales for people if they lose mental capacity, for example, through mania or severe depression.: To determine the proportion of people with bipolar disorder (BD) who utilise advance planning, their experience of using it and barriers to its implementation.: National survey of people with clinical diagnosis of BD of their knowledge, use and experience of the MCA. Thematically analysed qualitative interviews with maximum variance sample of people with BD.: A total of 544 respondents with BD participated in the survey; 18 in the qualitative study. 403 (74.1%) believed making plans about their personal welfare if they lost capacity to be very important. A total of 199 (36.6%) participants knew about the MCA. A total 54 (10%), 62 (11%) and 21 (4%) participants made advanced decisions to refuse treatment, advance statements and lasting power of attorney, respectively. Barriers included not understanding its different forms, unrealistic expectations and advance plans ignored by services.: In BD, the demand for advance plans about welfare with loss of capacity was high, but utilisation of the MCA was low with barriers at service user, clinician and organisation levels.