I asked another official Pommery reseller because KadeWe said they wouldn't ship.
They said they could reserve me a bottle when I asked a while ago. I contacted them again this week after I got the news of the London release but no answer yet.
Kadewe might get it sooner perhaps because Kadewe ownes Selfridges so they are connected.
Maybe I need to make a trip to Berlin then. Always worth a visit!