Emma is a solicitor whose client has just lost a professional negligence trial in the High Court. The trial judge found against Emma's client on all issues, dismissing the claim in its entirety. Emma believes the judge misapplied the legal test for breach of duty when considering the expert evidence. Her client wants to appeal immediately. Emma needs to advise her client on the first steps for bringing an appeal, including whether permission is required.
Which of the following statements best describes the requirement for permission to appeal under CPR 52.3?