Thanks for the info guys! Greatly appreciated.
I've used the Air Canada lounge in YHZ, however since I'm flying transborder I don't think they have a transborder lounge. Only domestic/international.
I have my Air Canada Elite card ( * Gold) which should get me and my partner into the RCC in ORD.
Do they have an arrivals lounge in T1 at London like Air Canada does?
I also purchased one of those E+ Access, so I hope it was worth the money. It's getting me and my partner E+ for our entire flights.