If CAA allow any JAA Examiner for a Skill Test PPL get it in writing first!
LASORS 2010, Section A, Page 10 Chart:
ACCEPTANCE OF NON-UK APPROVED TRAINING AND EXPERIENCE
"Flying Training hours undertaken to qualify for the grant of a JAR-FCL PPL (A) or PPL (H) - JAA State - Accepted in Full"
"Skill Test for PPL - JAA State - Not Accepted"