https://www.slab.org.uk/guidance/submission-of-accounts-when-both-aa-and-civil-legal-aid-have-been-provided/
Where the grant of advice and assistance proceeds to a grant of civil legal aid, you must send us both accounts together within:
Whichever is the latest.
There is an exception to this rule. You can send us an advice and assistance account on conclusion of the work under A&A, but only where there is no possibility of:
If you continue to provide civil legal aid, you must provide us with the relevant advice and assistance reference number when submitting your legal aid account.