An important stage in the formalisation of anti-slavery partnership work involves setting terms of reference and agreeing joint actions. You may want to encourage member organisations to adopt consistent policies, for instance on transparency statements, or procurement. It will also be essential to understand how your partnership relates to other local or regional bodies with an interest in modern slavery, such as community safety partnerships and local safeguarding boards.
The links lead to examples of the types of documentation that you may find useful.