"This lounge pass is valid only in conjunction with a confirmed same-day ticket from an arriving Air Canada international flight"

They still haven't figured out how this sentence makes no sense. The only flight into LHR which would have a "same-day ticket" as the day you would use the Arrivals Lounge is the Daylighter morning departure from YYZ. But of course, by the time it gets into LHR, the AL is closed. Your ticket from all other flights arriving into LHR from Canada will have YESTERDAY'S DATE on them, so techically you shouldn't be permitted into the AL..