but certainly there is no insistance upon a passport, a driver's license would be fine).
Luscombe, our driving licenses don't have photo's (except for very new ones) which probably explains it.
Here you are supposed to show photo ID to the examiner before the test, so if the test pass certificate has the same name and address as the logbook and medical, I don't see the need to send photo ID to the CAA - what could they possibly check it against unless you were physically present? Perhaps they just keep a copy of your photo on record?