tarannau>
I think that's a bit of a negative attitude. But fair enough if it isn't your cup of tea. However it is part of England cultural heritage, like it or not. I'm sure it ignores you as much as you dislike it though so I wouldn't worry

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Dance and music have been an integral part of nearly every culture on this planet and I think it would be sad to see a pass time like this vanish.
Wow that sounds horribly bitter you know?
I presume this train of thought will be saying the same of native Canadian First Nation culture? I have to say the train of thought espoused is off the mark. What you are probably alluding to above is much what happend with Scottish culture during the 19thC when the idea of the "noble savage" became popular, and highland culture was re-written for the Victorian upper classes.
Sir Walter Scott was fairly pivotal in this romaticisation of Scottish culture. I'm sure areas of English culture experienced the same, even Morris dancing (I believe some of the discussion regarding fertility dances may have been the result of the Victorians) had been around for a long time before.
Crispy>
I believe this (and the wiki article) to be incorrect. I spent some time discussing with a friend who is a Dr of English, and another chap who is an expert on dark ages through medieval life. Through the research one of them had done, they believed it actually went back to at least the late dark ages.
The Spanish idea came I believe because of the term "Moorish" however the research they discussed with me was that they believed the term to come from the old English phrase for Moor. Back then people carried a Moor pike which was a large stick used to help cross the peat bogs in the Moors. The idea was the dancing simply adopted the "Moor pike" as part of its routine and was then passed on down through history and adapted by each new generation.
Sword dancing also exists Northumberland and Scotland as well, not just Spain.
Long may it all continue, things like this make the world a little bit more of an interesting place, especially for folks who like to travel.