Agreed, and my fear is the CAA could use the requirement for differences training to specify microlights as being excluded from the provision recognising FAA licences. They might argue they can require differences training to be logged against a JAR licence but cannot do so with a foreign licence. Ultimately this comes down almost to a philosophical point: is the CAA inclined to permit something which should not obviously be banned, or will they ban something because it would be bureaucratically difficult to implement?