This is a wholesome thread

Love that this will be the OPs first experience, I hope they have a fantastic trip!
There are some great tips about lounges at LHR, about being able to use the lounge at Nashville, and using the club kitchen. One more tip is don't be afraid to use the call button if you need something during the flight, or if something isn't working (or you can't figure out how to make it work).
Have you seen the Flight Report site? There are a few reviews on there that might be of interest -->
https://flight-report.com/en/search/...&year_max=2024