https://www.slab.org.uk/guidance/rule-on-the-simultaneous-provision-of-aa-and-civil-legal-aid/
Advice and assistance must not be given in connection with proceedings before a court or tribunal at a time when your client is receiving legal aid. So, if your client has been granted civil legal aid, they cannot also receive advice and assistance in connection with those proceedings.
Advice and Assistance application procedures
This page includes information on how to apply for non-templated increases in expenditure under civil A&A. It covers the information you should provide us with; case-related factors to address in your application; the process for reconsideration of refused increases; the process for urgently needed increases; whether authority for retrospective increases is available; and other guidance you may wish to consider.