https://www.slab.org.uk/guidance/the-structure-of-fixed-payments/
The regulations prescribe a range of fixed payments relating to the case itself and chargeable according to circumstances:
Regulation 4(1A) provides that fixed payments are payable only under Schedule 1 or 1A as an alternative to each other in circumstances where summary legal aid is provided, and this provision is restated at regulation 4(7A) where there has been a transfer of certificate.
The following paragraphs describe the principal fixed payments prescribed in the Schedules, in order, and how they fit into the payments structure.
The regulations also make provision for further “add-ons” (again not terminology used in the legislation but helpful to distinguish from fixed payments in respect of the case itself) for work that is not included in the fixed payment for the case, for example in respect of trial days, conduct of a deferred sentence etc.
You should refer to the relevant Summary (at Appendix 1) when lodging an account.