I manged to grab one of these in the other direction. Again, it was a match of BA's fare of GBP1000 for r/t business.
BA's fare would not allow upgrades but AA's books into I class so no problem upgrading with SWU.
So LHR-LAX-LHR in F for GBP1000 and 2 SWUs - great way to requalify for EXP!