I've seen a bunch of recent threads on PPL licenses, class ratings, renewals, logging hours and all that stuff that people should be able to find in JAR-FCL or LASORS, but apparently can't.
Could it be they are looking in the wrong place? LASORS is in the main an advisory document; JAR-FCL has no legal status except where it is incorporated into the ANO.
If you can't find the answer in the correct reference usually the ANO, it would appear that there is no legally binding answer to the question.
Big changes to the ANO tomorrow for NPPL holders!
http://opsi.gov.uk/si/si2007/uksi_20073467_en_1