A pair. Characteristic with the yellow on the bill ending in a point long down the bill. Contrary to Bewick's Swan where the yellow ends in a vertical line around the nostrils. Common winter visitor in Denmark. Notice the bright iris on the close up bird. Uncommon? Can't find any information online about this - also Reeber in the new waterfowl book doesn't mention anything about it.
Second calendar year. Two different birds. Tinted coverts indicating the age of both. They came the three of them together, whereas two of them continued southwest after taking this photos, and one of them made a left turn and probably landed to rest in front of Kongelunden.