CH414200 | Charging penalties: appeals: what to do if you receive an appeal (direct tax) or a request for a review (direct and indirect tax)
From HM Revenue & Customs · Compliance Handbook
There is detailed guidance about the process for handling appeals and reviews in the ARTG.
If you receive a request for review, do not delay sending the case to the Legal Group, as delay may affect the review officer’s ability to complete the review within the 45 day turnaround time.