On "Stuck on the Treadmill, " for example, he plays a beefy riff in unison with Mr. Prodaniuk, a technique that found its way into early heavy metal, but which Mr. Thompson said is common in Celtic folk.

WSJ: Still Electric After All These Years | Richard Thompson | By Jim Fusilli

People have said the thing we have in common is our Celtic background, but what we also have in common is London.

WSJ: The Novelists

It galvanised a tired end-of-festival audience into forming, spontaneously, a giant dance circle joining hands being a Celtic form of applause that is as common as clapping.

ECONOMIST: Celtic music