Back in 1998, I went to a conference where an American postgraduate student presented a paper entitled 'Is There a Scottish Singing Style?' I won't trouble you with the abstract, which contained some pretty dubious assumptions; but in essence her conclusion was 'Er, no, there isn't. But there are Scottish singing styles.' It had taken her quite a long time, and a great deal of careful analysis, to reach that stunningly obvious conclusion.

Exactly the same thing can be said of English tradition. It varies from one part of the country to another; and, back when there were still quite a lot of traditional singers, it often varied radically from one village to another.

Some of the early C20 collectors (Sharp, for example) encountered very little ornamentation, and assumed that English singers generally didn't use it; others (Grainger, for one) found quite a lot. The point is that they were working in different areas, and there is not (and never has been, so far as can be told), a 'national' style in any country in this world.

People who don't know much about folk music will always tend to assume that anything you sing or play, if they like it, must be Irish. As you will know, 'Celtic' is a meaningless term as applied to traditional music, though it is a useful marketing tool.

Of course, you may very well have picked up a style of ornamentation that sounds Irish, particularly if you get your songs from recordings made by Revival performers, many of whom have (it would seem) never listened to an English traditional singer in their lives, but instead sing in the hybrid 'folk club' style that developed in the 1960s. There is nothing wrong with that style, of course; except that it doesn't really reflect the way traditional singers actually sang.