A very interesting list from Johnny Adams. Now, I would certainly put Dave Swarbrick as the most influential fiddler in the English folk revival. And so many people have followed him, and then others have followed his followers, that the style has become very dominating arounbd the folk scene. But I would not classify his approach as very English in any traditional sense. It is just very Swarbrick!
    As I said previously, there are a multiplicity of English styles, so to pick out the "one and only authentic English" fiddler is impossible. But I would suggest, of those who are still with us as opposed to those who made the name we call it by: you wouldn't go far wrong if you had a listen to
Paul Roberts(in the north)
or Flos Headford (in the south).
Or, as Johnny Adams mentioned, the "even more wonderful Kate Barfield" (who virtully never plays decorations except slides and double strings, in common with a lot of traditional players)