I was just comparing some things for our trip next spring and saw this sale on. Bookings need to be by March 19. The sale I saw was for UK departures to various US cities. Some were really low. I wish I could luck out and have the same sale opportunity, but in reverse next year!
https://flights.virginatlantic.com/en-gb/upper-class-flight-deals?cta=VA_NHP_hero_uppersavings