I used to have a Ford Focus which was build in 2003. Whilst out shopping the wife managed to lock the keys in the boot.
Called out the AA who promptly arrived, unscrewed one of the lights (I won't say which one), removed the bulb and connected a small box of tricks to the connections in the bulb socked. Pressed a button and the central locking unlocked all the door.
Time taken to from start to finish was about 2 minutes.
So there you go. Ford named as a manufacturer that certainly has done this in the past and probably still does.
Admittably you would still need the small box of tricks but I would imagine it was nothing special and any self respecting car thief would have one of these in their arsenal.