[WoofDog123]

from the article,

"Britain, Denmark and Ireland are not part of the Schengen pact."

Last I was there (last year), denmark WAS part of Schengen, as well as Norway, Sweden, and Iceland (not sure about finland)....Britain and Ireland maintain a separate passport zone, but between the republic of ireland and the uk, as well as jersey and guernsey there are no passport controls. I don't know about gibraltar. In practice, border controls between Switzerland and the Schengen countries (meaning all of switzerland's borders) are lax at best, I have yet to be actually stopped in car across the german/swiss border.

[Smile-n-Win]

Last I was there (last year), denmark WAS part of Schengen, as well as Norway, Sweden, and Iceland

Norway and Iceland are not in the EU at all, so I don't think they are part of Schengen. But passport checks are frequently omitted at the borders of the Schengen area.