"One interesting note about the interior, there is a driver side vanity mirror in the sun visor yet none on the passenger side, perhaps this was carried forward from right hand drive models"
Makes sense to me. Most commuters I pass have no passengers, and in any case, the driver is usually the person who is paying for the car. Why not have a driver-side mirror? Unlike the driver, a passenger can afford to be distracted by fiddling in his/her bag and getting out a hand-held mirror if self-gazing is important.