Kind of an odd scenario - I will be transiting thru LHR in a few weeks on a long layover.
I'm flying into a different terminal with a different airline on a different ticket, but I fly out on VS Upper.

I don't want to clear security for the main clubhouse early only to leave for London a short time later and re-clear later in the afternoon.
So, I was planning on clearing customs in the other terminal, going to T3 Revivals, before then checking all my bags and going into London for a bit.

I'm mildly confused by the VS Revivals lounge terms since all bullet points except for DL One and VS Upper have asterisks indicating that they strictly need to be arriving flights.
Does the T3 arrivals lounge care that my VS Upper ticket is one that I haven't flown on yet and is departing later in the day? Any (recent) experience with them would be greatly appreciated!