All appendices supplied by an applicant should be relevant and provide additional supportive details and evidence, directly aligning with your main plan, without introducing new principles. They should contain information that supports the application and addresses the criteria.
While we have not set a limit on the number of appendices recommended by us, applicants should be aware of this section of the Stage 2 supplementary guidance (page 11), which states that: we will not review any appendices which are deemed by us to be unnecessary, or which are not directly addressing the application criteria and there is no guarantee that information in appendices will be reviewed or included in the assessment of your application.
For further advice on writing a business plan and what you should include in your appendices please see the Business Planning Guidance.