Once again, failing memory. I "knew" the C.102 was first from my youth. Then Airfames has to correct me. Since I did not want to believe newer sources, this caused me to find my copy of "Jet Aircraft of the World, 1955" where I learned all this in my youth. There it was, just as Airframes said, D.H. Comet 27 Jul 49 and Avro C.102 10 AUG 49. I did learn why I was sure the C.102 was first, because the text said "first to fly on the American continent". I stand corrected again.