Am i reading it right ??

I have a flying co business account , as well as the usual perosnal one. After my flight this week I will have over 10k in the company account
now looking at the business spend miles I can either use 10k for a lounge pass on the return trip (LHR-EWR) OR upgrade from PE to UC..........
you know whats coming...IF I upgrade to UC before the flight -dont I get lounge access anyway ??? if so I dont have to think too hard how to spend the miles
even if no lounge access i still think 7 hours of comfort wins
now looking at the business spend miles I can either use 10k for a lounge pass on the return trip (LHR-EWR) OR upgrade from PE to UC..........
you know whats coming...IF I upgrade to UC before the flight -dont I get lounge access anyway ??? if so I dont have to think too hard how to spend the miles

even if no lounge access i still think 7 hours of comfort wins