CAA Flight Examiners Handbook, Version 2003
Section 2.6.1
"In accordance with ANO Article 101, all flight instruction and testing for the purposes of becoming qualified for the grant of a pilot's licence or the inclusion of an aircraft rating. a night rating or a night qualification must be carried out at a licensed aerodrome or a UK Government Aerodrome.
This paragragh covers most things apart from a LPC and OPC Most of the time both pilots are licenced and type rated on type. Therefore the "candidate" is not being tested for the purpose of a pilots licence or the inclusion of an aircraft rating.
Small point I know but it`s not very clear.
Sorry Kalif just re-read your post and you cover what I have posted in your last sentence.