Cedarjet- I think he was talking about why it was discontinued, not why is there no Y class.
I thought the LHR
-DEL route was part of UA
's around the world flight. I thought it went something like IAD
and the other way around. Not 100% sure though if that was the exact routing. Anyway I think the around the world routes were discontinued after 9/11. I think the route also was operated with a 744. Someone correct me if I'm wrong.