Why is there an additional fee for ISA (UK) 315 (2022/23 and 2023/24 audits only)?

Fees for new recurring audit requirements are only consolidated into the scale fee once we have sufficiently reliable information of the ongoing audit work needed. The audit work for ISA (UK) 315 (risks of material misstatement) and linked work on ISA (UK) 240 (fraud) has been included in the 2024/25 scale fees, but we process it as fee variations for 2022/23 and 2023/24 because the Regulations do not allow us to update those scale fees once set, i.e. after 30 November 2022 and 2023 respectively.