"English country dancing and folk songs either no longer being taught at English schools or certainly far less than they were say half way through last century."

In what way, are immigrants to blame for the apathy and general disinterest of the English towards their own folk heritage, or indeed for what we choose to keep on the curriculum?

If anything I would suggest that many immigrant groups *lead by example* in terms of their maintenance within British culture of their own styles of music, song and dance. Take the much hated Paddies back in the fifties, of whom I'm descended (My cousin now runs an Irish dancing school in London): in the face of immense hostility ("a hammering"?) to their culture, they successfully maintained it, until ironically it has now been warmly embraced by an English generally apathetic to their own traditions.

If anything I suspect the recent revival of native interest in traditional English song and custom, has actually been born from English interest in equivalent Irish traditions.