Who brought in the Anglo-Saxons? The English are as Norse as they are Anglo Saxon, and about as Celtic as well, among other things.

The point is, and it's a casual enough point, Tolkien was, as Little Hawk said, making a world modelled on the whole of Western Europe, at least. The idea of the different peoples and the different societies was a central part of it, with their different languages and customs and no doubt different music and dances.

If the film blurred these differences, I think it would be a pity. Within that tapestry the Shire and the Hobbits are the English part, and I'd hope that that was reflected in the way they and their society were presented - and there's lots of English music that would be exactly right for that kind of treatment.

It's nothing to do with "nationalist begrudgery" for God's sake. (Though that's a great phrase, and there's a lot of that about sometimes on some threads.) You think McGrath is an English name? You think the Engish by and large give their own music anything like the kind of respect it deserves?