Um, since when is Germany one of the 'allied nations that took part in D-Day'?

Um, since when is Germany one of the “allied nations that took part in D-Day”? Well, Germany did take part in D-Day, but they weren’t an ally, obviously. From the official account of the Royal Family:

The Queen was introduced to leaders by the Prime Minister @10DowningStreet – each representing the allied nations that took part in D-Day. #DDay75 pic.twitter.com/8rQ5I0gTBZ

— The Royal Family (@RoyalFamily) June 5, 2019

If Merkel gets to be there, why isn’t Vladimir Putin?