Background. In England, people with a serious mental illness are offered a standardized care plan under the Care Programme Approach (CPA). A crisis plan is a mandatory part of this standard; however, the quality and in particular the level of individualisation of these crisis plans are unknown. In this context, the aim of this study was to assess the quality of crisis planning and the impact of exposure to a specialized crisis planning intervention. Method. The crisis plans of 424 participants were assessed, before and after exposure to the Joint Crisis Plan (JCP) intervention, for 'individualisation' (i.e., at least one item of specific and identifiable information about an individual). Associations of individualisation were investigated. Results. A total of 15% of crisis plans were individualised at baseline. There was little or no improvement following exposure to the JCP. Individualised crisis plans were not associated with a history of prior crises or incidences of harm to self and others. Conclusions. Routine crisis planning for individuals with serious mental illness is not influenced by clinical risk profiles. 'Top down' implementation of the policy is unlikely to generate the best practice and compliance if clinicians do not perceive the clinical value in the process.