correct
Flight Tests Examiners Miscellaneous Guidance 2.4.3 29May09
Examiners should not conduct more than 3 (three) sequential tests(whether successful or not) on any student or rated applicant without prior approval of the CAA Staff FE (H) (Capt. Fred Cross)
Just to explain, for those that are fairly new to this subject, it used to be that once you had your licence all you needed to keep current was to fly 5 hours a year and get an authorised person (usually your instructor) to sign a Certificate of Experience. A simple paperwork exercise that didn't take into account any possible reduction in ability.