Originally Posted by
InTheAirGuy
SonOfITAG and SonofITAG wife are flying YYZ-LHR-OSL and are on a status pass.
FAQ does not seem clear - will they be able to access the MLL lounge in LHR?

I would guess no. They have access prior to AC operated flights. LHR-OSL is not AC-operated, and the LHR MLL is not eligible for arrival access (not that STPA gets you that regardless).