British Airways has made further changes to its DFW to London Heathrow service, with the second flight now starting this Tuesday, October 19. This is a bit earlier than the previous plan of early November. The second flight will end on December 6.
Schedules:
BA 141 LHR 1200 1600 DFW
BA 140 DFW 1750 0855 DFW
BA 192 LHR 2000 1105 DFW
BA 193 LHR1410 1810 DFW
Now, the second flight, BA 140/141, goes to 6x weekly, with no Sunday service, on November 1. You might do well to check the schedule online as it seems to fluctuate a bit.
BA 140 DFW 2100 1105 LHR
BA 141 LHR 1330 1830 DFW
Now, as far as the supposed A380 service, it is of note that when booking on BA.com after December 6/7ish, the aircraft type on the BA192/193 flight is not listed.