I am flying next week through Zurich -- arriving from LHR on Swiss, connecting to IAD on United. I am a bit confused by the lounge construction and the recent changes and have found conflicting information online. Could someone advise which lounge I will have access to? I will be in paid business class on both the inbound Swiss and outbound United flights but am only Star Alliance Silver via United. I will have about a 3 hour layover.