Changing supplementary AMEX Plat (UK) cardholder and Priority Pass.
Would like to change my supplementary card holder (the free additional Platinum one) on my Platinum card (UK Personal version).
What happens with regard to Priority Plus ?
When would current (to be cancelled) supplementary card holder's PP membership expire ?
And when would the new person's PP start ?
Not looking to game the system, just hoping there isn't something involved which would mean the new card holder couldn't get the PP membership for a period of time say calender year, financial year, or my account anniversary date etc....
TIA.