The problems reported here will doubtless also be shared by the I-Pace, especially that of frozen door handles, rendering the car useless. A couple of times recently, my powerfold mirrors have been frozen in the folded position; a minor irritation easily resolved, but if one can't reach the door handles, one is stuffed.
Its an interesting Problem Phil , not so much of an issue on the Driveway at Home with the proverbial kettle of boiling water but leaving the Office at nightime more of a Problem . I suddenly had a flashback to the British Leyland Crap of the Seventies and the Morris Marina Doorhandle which would simply break in a hard frost
Although I can't comment on frozen door handles, not being able to gain entry to your car in such an event is indeed an issue. Then it occurred to me that on my car (I think I remember), if you hold the unlock button down it will lower the windows. Maybe this would work on an I-Pace to gain access. Won't help if the windows are frozen solid also though