Just a heads up: I am flying PHX-LAS on AA, then immediately connecting LAS-LHR in Club. The agent in Phoenix firmly refused entry to the Lounge. “You *must* be departing directly from Phoenix to Heathrow - it doesn’t matter that you’re flying BA in CW from somewhere else, and your BA silver status doesn’t work either.”

Pretty flagrant violation of the rules, but I’m not the type to cause a scene. I’ll instead write a strongly worded letter...