Major problems with door locks

[4.6toddy]

My problem started with a very normal X5 problem, door handle carrier. drivers side front. In an ice storm a few weeks ago, I pulled the handle and "pop" - i know the symptom, its out of the carrier. External handle on drivers door is sitting a bit popped out. not major, thanks to xoutpost I can fix myself.

While awaiting the part and the time to repair, I was simply using the remote roll down the window, reaching in and grabbing the handle, or just holding the key in the lock to accomplish the same. or have my wife reach across and open the drivers door. no problem

now something totally weird has gone on. I can't use the key in the lock cylinder, it feels disengaged from the guts. It turns freely, with no type of click or anything.
Now, from the inside, the doors will not lock. they all in the unlock position. using the remote and the lock buttons, does not unlock or lock any doors. Just dead. Rear hatch will not open at all.

Where do I go? I've searched on here and checked my labour guides and am not sure where to begin. If i'm lucky there's just a common fuse for locks and rear hatch module but that seems odd.

Central locking module? if so where is it?
relay?


Stumped
please point me in a direction xoutposters

Thx