Dark-tailed 3cy European Herring Gull with a slight 'Nearctic feel'

The search for smithonianus in Denmark continues, but besides the rather dark tail in this individual seen in Hanstholm Harbour 29 March 2013, it obviously lacks a more uniformly coloured lower hindneck, mantle and underparts. Nevertheless, I am sure we will get American Herring Gull sooner or later. Here are a couple of examples of other dark-tailed European Herring Gulls photographed in Norway, Scotland, Scotland, Scotland, Scotland and Denmark.