So have I got this right?
An FAA IR can use his (her) rating on a G reg aircraft only in the UK, but on an N reg anywhere?
An N reg aircraft can be flown by a JAR pilot as PIC in the UK, but not abroad? Abroad, a JAR pilot can fly recording the time as PIC on an N reg only if accompanied by another FAA qualified pilot also being PIC in his own FAA logbook.