thesaints

From the Delta - Virgin Atlantic Partnership FAQ

- DO I HAVE ACCESS TO VIRGIN ATLANTIC CLUBHOUSE LOUNGES?
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Diamond, Platinum and Gold Medallion Members are allowed to bring one guest.
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Benefits All Around
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Diamond and Platinum Medallion Members can reinvigorate after your flight to London in the Virgin Atlantic Revivals Lounge
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also, from the FAQ
Priority Security: Priority security available at select airports. At LHR, Diamond and Platinum Medallion members will be able to use priority security through the Private Security Channel at Upper Class Wing or Upper Class Check-In. Gold Medallion members will be able to use priority security through the Fast Track Channel. Please see Virgin Atlantic agent for more details. Members are allowed to bring one guest through Priority Security and Fast Track.

Although, the front page now says
DM/PM Before you depart, enjoy complimentary access to LHR’s Fast Track security lane.