https://www.slab.org.uk/faqs/applicants-including-spouse-partner-and-any-dependants/
There are several different types of legal aid and the information needed can vary. The information you will be asked to provide is necessary to consider and process your application, and if legal aid is granted to administer any grant of legal aid that is made during the lifetime of the case and in relation to any relevant final or follow-up steps that arise at the end of the case in terms of legal aid regulations and our functions.
The information you will be asked to provide will be about you and your circumstances, such as household, financial and case details, so far as they are relevant to your application, such as: