G-XLEK, the A380 that was meant to operate the 10AUG IAD-LHR, returned to Heathrow as BA 9602 as a day flight on 11AUG, departing Dulles at 08:29 this morning and landing at 19:55.
As this flight didn't appear on BA.com, my assumption is that no passengers were onboard.
The cancellation code remains HDLG - not yet changed to a HDLY/HDLN.